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10 Worst Computer Viruses in history

Computers viruses, worms, ransomware, etc. are kinds of malicious software that no user should take lightly. On several occasions, we have touched upon security steps that each user should take in order to protect its identity and data. Sadly sometimes even when all precautions are taken some malware can still slip through and wreak havoc. Today we are looking at some of the worst or the best, depending on your view that has indeed wreaked plenty of havoc.

viruses10 worst computer viruses in history

In the list of the 10 most famous computer viruses below, we show the costs, dates, reach, and other key facts. First a note about terms: we use the words “virus” and “worm” interchangeably because most readers search for them that way. But there’s a subtle difference that we explain after the list.

1. Mydoom – $38 billion

The worst computer virus outbreak in history, Mydoom caused estimated damage of $38 billion in 2004, but its inflation-adjusted cost is actually $52.2 billion. Also known as Novarg, this malware is technically a “worm,” spread by mass emailing. At one point, the Mydoom virus was responsible for 25% of all emails sent.
Mydoom scraped addresses from infected machines, then sent copies of itself to those addresses. It also roped those infected machines into a web of computers called a botnet that performed distributed denial of service (DDoS) attacks. These attacks were intended to shut down a target website or server.

Mydoom is still around today, generating 1% of all phishing emails. That’s no small feat considering the 3.4 billion phishing emails sent each day. By that figure, Mydoom has taken on a life of its own, infecting enough poorly-protected machines to send 1.2 billion copies of itself per year, 16 years after its creation.
Though a $250,000 reward was offered, the developer of this dangerous computer worm was never caught.
Wondering what makes the world’s most secure computers so safe? See the Tech@Work guide: Upgrade to the World's Most Secure and Manageable PC

2. Sobig – $30 billion

The 2003 Sobig computer virus is actually another worm. It is second only to the Mydoom virus in its scope. The $30 billion figure is a worldwide total, including Canada, the U.K., the U.S., mainland Europe, and Asia. Several versions of the worm were released in quick succession, named Sobig.A through Sobig.F, with Sobig.F being the most damaging.
This cybercriminal program masqueraded as legitimate computer software attached to emails. It disrupted ticketing at Air Canada and interfered with countless other businesses. Despite its widespread damage, the creator of the successful bug was never caught.

3. Klez – $19.8 billion

Klez is a close third on the list of the worst computer viruses ever created. With nearly $20 billion in estimated damages, it infected about 7.2% of all computers in 2001, or 7 million PCs. The Klez worm sent fake emails, spoofed recognized senders and, among other things, attempted to deactivate other viruses.
As with other viruses and worms, Klez was released in several variants. It infected files, copied itself, and spread throughout each victim’s network. It hung around for years, with each version more destructive than the last.
Windows has come a long way since most of the computer viruses on this list hit the web. Thankfully, built-in protection with Microsoft Defender is always on the watch.

4. ILOVEYOU – $15 billion

The year 2000’s ILOVEYOU virus worked by sending a bogus “love letter” that looked like a harmless text file. Like Mydoom, this attacker sent copies of itself to every email address in the infected machine’s contact list. Shortly after its May 4 release, it had spread to more than 10 million PCs.
The virus was created by a college student in the Philippines named Onel de Guzman. Lacking funds, he wrote the virus to steal passwords so he could log into online services he wanted to use for free. He reportedly had no idea how far his creation would spread. This virus is also known as Loveletter.
Need to up your remote work security game before there’s another entry on the list of most deadly computer viruses? See our guide: How to Work Remotely and Securely

5. WannaCry – $4 billion

The 2017 WannaCry computer virus is ransomware, a virus that takes over your computer (or cloud files) and holds them hostage. The WannaCry ransomware ripped through computers in 150 countries, causing massive productivity losses as businesses, hospitals, and government organizations that didn’t pay were forced to rebuild systems from scratch.
The malware raged like wildfire through 200,000 computers worldwide. It stopped when a 22-year-old security researcher in the U.K. found a way to turn it off. Computers with out-of-date operating systems were hit especially hard. That’s why security experts always recommend updating your systems frequently.

Ransomware strikes again

In September 2020, one of the potentially largest computer virus attacks in medical history hit Universal Health Services. The U.S. hospital chain, which has more than 400 locations, was reportedly struck by damaging ransomware. The attack forced the cancellation of surgeries and made healthcare workers switch to paper records.

6. Zeus – $3 billion

The Zeus computer virus is an online theft tool that hit the web in 2007. A whitepaper by Unisys three years later estimated that it was behind 44% of all banking malware attacks. By then, it had breached 88% of all Fortune 500 companies, 2,500 organizations total, and 76,000 computers in 196 countries.
The Zeus botnet was a group of programs that worked together to take over machines for a remote “bot master.” It originated in Eastern Europe and was used to transfer money to secret bank accounts. More than 100 members of the crime ring behind the virus, mostly in the U.S., were arrested in 2010. It’s not as prominent today, but some of the virus’ source code lives on in newer botnet viruses and worms.

Zeus caused documented damage of $100 million. But the real cost in terms of lost productivity, removal, and undocumented theft is undoubtedly much higher. A $3 billion estimate, adjusted for inflation, puts this virus at a cost of $3.7 billion in today’s dollars.

7. Code Red – $2.4 billion

First observed in 2001, the Code Red computer virus was yet another worm that penetrated 975,000 hosts. It displayed the words “Hacked by Chinese!” across infected web pages, and it ran entirely in each machine’s memory. In most cases it left no trace in hard drives or other storage.
Financial costs are pegged at $2.4 billion. The virus attacked websites of infected computers and delivered a distributed denial of service (DDoS) attack on the U.S. White House’s website, www.whitehouse.gov. In fact, the White House had to change its IP address to defend against Cod Red.
Can your printer get a virus? See our cool infographic: The State of Printer Security

8. Slammer – $1.2 billion

The SQL Slammer worm cost an estimated $750 million across 200,000 computer users in 2003. This computer virus randomly selected IP addresses, exploiting vulnerabilities and sending itself on to other machines. It used these victim machines to launch a DDoS attack on several internet hosts, significantly slowing internet traffic.
The Slammer worm hit banks in the U.S. and Canada especially hard, taking ATMs offline in many locations. Customers of Toronto’s Imperial Bank of Commerce found themselves unable to access funds. The attack reared its ugly head again in 2016, launching from IP addresses in Ukraine, China, and Mexico.

9. CryptoLocker – $665 million

Thankfully, ransomware attacks like the 2013 CryptoLocker virus have dipped since their 2017 peak. This malware attacked upwards of 250,000 machines by encrypting their files. It displayed a red ransom note informing users that “your important files encryption produced on this computer.” A payment window accompanied the note.
The virus’ creators used a worm called the Gameover Zeus botnet to make and send copies of the CryptoLocker virus. According to a report by security firm Sophos, the average ransomware attack costs a business $133,000. If we estimate that CryptoLocker hit 5,000 companies, that would put its total cost at $665 million.
Where will cybersecurity go next? See our guide: The Future of Cybersecurity

10. Sasser – $500 million

The Sasser worm was written by a 17-year-old German computer science student named Sven Jaschan. He was arrested at the age of 18 in 2004 after a $250,000 bounty was posted for the computer virus’ creator. A friend of Jaschan’s tipped authorities that the youth had penned not only the Sasser worm but also the damaging Netsky.AC attack.
Jaschan was given a suspended sentence after it was found he was a minor when he wrote the malware. The Sasser worm crashed millions of PCs, and though some reports put damages at $18 billion, the relatively low infection rate suggests a more likely cost of $500 million.
Other notable viruses

The top 10 worst computer viruses above are just the ugly tip of a gargantuan digital iceberg. With a million new malware programs popping up every 3 years, we may miss the forest for a few outstanding trees. Here are just a few more viruses that have wreaked havoc over the years:

Mimail: This worm tried to harvest data from infected machines to launch a string of DDoS attacks, but was relatively easy to remove.

Yaha: Yet another worm with several variants, thought to be the result of a cyber-war between Pakistan and India.

Swen: Written in C++, the Swen computer worm disguised itself to look like a 2003 OS update. Its financial cost has been pegged at $10.4 billion, but not reliably.

Storm Worm: This worm showed up in 2007 and attacked millions of computers with an email about approaching bad weather.

Tanatos/Bugbear: A 2002 keylogger virus that targeted financial institutions and spread to 150 countries.

Sircam: A computer worm from 2001 that used counterfeit emails with the subject line, “I send you this file in order to have your advice.”

Explorezip: This worm used fake emails to spread to every machine on thousands of local networks.

Melissa: The most dangerous computer virus in 1999, Melissa sent copies of itself that looked like NSFW pics. The U.S. FBI estimated cleanup and repair costs at $80 million.

Flashback: A Mac-only virus, Flashback infected over 600,000 Macs in 2012 and even infected Apple’s home base in Cupertino, Calif. In 2020, there’s now more malware on Macs than on PCs.

Conficker: This 2009 virus still infects many legacy systems and could do significant damage if it ever activates.

Stuxnet: This worm is reported to have destroyed Iranian nuclear centrifuges by sending damaging instructions.

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Remove ChatZum from Windows

ChatZum is a Potentially Unwanted Program that installs a Toolbar into your browser. This program allegedly allows users to zoom in on photos without clicking on them, however, upon further research, it was discovered that this function does not work on the latest version of browsers.

From the Author: ChatZum is a Browser add-on (toolbar) that enables its users to hover over images in Major Social network's websites and view a larger version of an image.

While installing this toolbar will track user web browsing sessions and will record website visits, clicks, and sometimes even personal information. This information is later used to display targeted ads to the user. To allow easier user tracking, the program changes the browser home page and default search engine to Nation Search Advanced, which injects additional advertisements and tracks user activity.

Several anti-virus applications have marked this program as Potentially Unwanted, and it is not recommended to keep it on your computer, especially considering the fact it will most likely not work on your browser.

About Potentially Unwanted Applications

If you have ever installed a free application or shareware, chances are high that the computer will get installed with a bunch of unwanted applications. A Potentially Unwanted Program, also called PUP, in short, is actually software that contains adware, installs toolbars, or has got other hidden objectives. These types of programs are generally bundled up with a free application that you download from the internet or may also be bundled inside the custom installers of many download websites. PUPs aren’t always viewed as “pure” malware in the strictest sense. A fundamental difference between PUP and malware is distribution. Malware is normally dropped by silent installation vectors like drive-by downloads while PUP gets installed with the consent of the computer user, who knowingly or unknowingly approves the PUP installation on their computer system. But, there is no doubt that PUPs remain bad news for PC users as it could be quite dangerous to your computer in many ways.

The damage PUPs can do

The unwanted programs after installation display numerous annoying pop-up ads, trigger fake alerts, and sometimes even forces a computer owner to pay for the software. PUPs that come as browser add-ons and toolbars are commonly recognizable. These toolbars alter your homepage and your search engine in the installed web browser, track your web activities, modify your search results with redirects and sponsored links, and eventually slow down your browser and diminish your browsing experience. Potentially unwanted programs use aggressive distribution methods to get onto your computer. The worst part of setting up a PUP is the adware, spyware, and keystroke loggers that could lurk inside. Even if the PUPs really aren’t inherently malicious, these applications still do practically nothing good on your PC – they’ll take valuable system resources, slow down your PC, weaken your computer security, making your PC more vulnerable to malware.

How to avoid ‘crapware’

• Read the EULA thoroughly. Look for clauses that state that you have to accept advertising and pop-ups or bundled applications from the company. • Always opt for the custom if you’re offered an option between “Custom” and “Recommended” Installations – never ever click Next, Next, Next thoughtlessly. • Use a good anti-malware application. Try Safebytes Anti-malware which can find PUPs and treat them as malware by flagging them for deletion. • Be alert if you download and install freeware, open-source applications, or shareware. Do not ever install software applications that seem shady or malicious. • Always download applications from the original website. The majority of PUPs find their way onto your laptop or computer is via download portals, so steer clear of it altogether. Remember the fact that even though PUPs could potentially cause damage and hinder the proper functioning of the PC, they can’t enter into your system without your consent, so be alert not to provide them with it.

How One Can Get rid of Malware that is Blocking Websites or Preventing Downloads

Malware could potentially cause many kinds of damage to PCs, networks, and data. Some malware goes to great lengths to stop you from downloading or installing anything on your computer, especially antivirus software. If you’re reading this article, odds are you’re stuck with a malware infection that is preventing you to download or install the Safebytes Anti-Malware program on your PC. Even though this sort of problem can be tougher to circumvent, there are some steps you can take.

Make use of Safe Mode to resolve the issue

If the malware is set to run automatically when Microsoft Windows starts, stepping into safe mode could block the attempt. Just minimal required programs and services are loaded when you boot your computer in Safe Mode. To launch your Windows XP, Vista, or 7 computers in Safe Mode with Networking, do as instructed below. 1) Tap the F8 key repeatedly as soon as your PC boots, however, before the big Windows logo or black screen with white texts come up. This would invoke the Advanced Boot Options menu. 2) Choose Safe Mode with Networking with arrow keys and hit ENTER. 3) When this mode loads, you should have the internet. Now, obtain the malware removal program you want by utilizing the web browser. To install the program, follow the guidelines in the installation wizard. 4) Right after installation, do a full scan and allow the software program to get rid of the threats it detects.

Switch to an alternate internet browser

Some malware mainly targets certain browsers. If this is your situation, employ another internet browser as it might circumvent the computer virus. When you suspect that your Internet Explorer has been hijacked by a trojan or otherwise compromised by online hackers, the best thing to do is to switch over to an alternate internet browser such as Mozilla Firefox, Google Chrome, or Apple Safari to download your chosen security program – Safebytes Anti-Malware.

Create a portable USB antivirus for eliminating viruses

Another technique is to download and transfer an antivirus application from a clean computer to run a scan on the infected computer. Follow these steps to run the anti-malware on the affected computer. 1) Download the anti-malware on a virus-free PC. 2) Connect the flash drive to a USB slot on the clean computer. 3) Double click on the exe file to run the installation wizard. 4) Choose the USB stick as the location for saving the file. Follow the instructions on the screen to finish off the installation process. 5) Now, transfer the flash drive to the infected computer. 6) Run the Safebytes Anti-malware directly from the USB drive by double-clicking the icon. 7) Click the “Scan Now” button to start the virus scan.

Protect your PC from Malware With SafeBytes Security Suite

If you are looking to install an anti-malware program for your PC, there are lots of tools in the market to consider nonetheless, you just cannot trust blindly anyone, regardless of whether it is a paid or free program. A few of them are great but there are several scamware applications that pretend as authentic anti-malware programs waiting around to wreak havoc on your PC. You have to pick a company that develops industry-best anti-malware and it has earned a reputation as reliable. One of the highly recommended applications by industry analysts is SafeBytes Anti-Malware, the safest program for Microsoft Windows. SafeBytes can be described as a highly effective, real-time antivirus application that is made to assist the average computer user in protecting their PC from malicious internet threats. Through its cutting-edge technology, this software will help you protect your computer against infections brought on by various kinds of malware and other internet threats, including spyware, adware, trojans, worms, computer viruses, keyloggers, ransomware, and potentially unwanted program (PUPs).

There are many wonderful features you’ll get with this particular security product. Listed below are some of the features you will like in SafeBytes.

Active Protection: SafeBytes offers a completely hands-free active protection and is set to observe, block, and kill all computer threats at its very first encounter. It will check your PC for suspicious activity at all times and its unrivaled firewall shields your computer from illegal entry by the outside world. Robust, Anti-malware Protection: Using a critically acclaimed malware engine, SafeBytes offers multilayered protection which is made to catch and remove threats that are concealed deep inside your PC. Web Security: Safebytes allots all sites a unique safety ranking that helps you to get an idea of whether the webpage you’re just about to visit is safe to view or known to be a phishing site. Extremely Speed Scanning: SafeBytes’s virus scan engine is among the fastest and most efficient in the industry. It's targeted scanning significantly increases the catch rate for viruses which is embedded in various computer files. Lightweight: SafeBytes is really lightweight software. It consumes an extremely small amount of processing power as it runs in the background which means you will not observe any computer performance difficulties. 24/7 Support: For any technical concerns or product assistance, you may get 24/7 expert assistance via chat and email. To sum it up, SafeBytes Anti-Malware offers outstanding protection combined with an acceptable low system resources usage with both great malware detection and prevention. You now may realize that this particular tool does more than just scan and remove threats from your computer. You will get the best all-around protection for the money you pay on SafeBytes AntiMalware subscription, there’s no question about it.

Technical Details and Manual Removal (Advanced Users)

If you wish to do the removal of ChatZum manually rather than using an automated software tool, you can follow these simple steps: Navigate to the Windows Control Panel, click the “Add/Remove Programs” and there, choose the offending application to remove. In case of suspicious versions of web browser plug-ins, you can easily get rid of it through your web browser’s extension manager. You might also want to reset your home page and search providers, as well as delete browsing history, temporary files, and cookies. If you choose to manually remove the system files and Windows registry entries, use the following list to make sure you know exactly what files to remove before undertaking any actions. Please note that only advanced users should try to manually edit the system files mainly because removing any single vital registry entry results in a serious problem or even a PC crash. In addition, certain malware is capable of replicating itself or preventing its removal. Doing this malware-removal process in Safe Mode is recommended.
Files: Search And Delete: tbcore3.dll arrow_refresh.png basis.xml chatzum.dll info.txt inst.tmp loaderie.js suggestion_plugin.dll TbCommonUtils.dll tbcore3.dll tbhelper.dll TbHelper2.exe uninstall.exe uninstaller.exe update.exe Folders: C:\Program Files\ChatZum Toolbar\ C:\Documents and Settings\username\Application Data\Mozilla\Firefox\Profiles\gb5e8gtn.default\extensions\staged\ADFA33FD-16F5-4355-8504-DF4D664CFE83 Registry: Key HKLM\SOFTWARE\ChatZum Toolbar Key HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\ChatZum Toolbar
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Fixing PowerShell: File cannot be loaded ...
If you are using Windows PowerShell and it suddenly throws an error message saying, “File cannot be loaded because running scripts is disabled on this system”, then read on as this post will guide you on how you can fix this issue your Windows 10 computer. This kind of error in PowerShell is most likely due to the fact that your user account does not have the required permissions to execute the script. Although this does not mean that you need to have administrator-level permissions as it could also indicate that you have to be unrestricted to run these types of PowerShell scripts or cmdlets. Thus, to fix the error and carry out the task, you have to set the execution policy to be unrestricted. And to do that, you need to use the steps provided below as a reference. Step 1: To get started, you have to check what policies are set for the individual user groups on your computer by tapping the Win + X key combination or by right-clicking on the Start button and clicking on Windows PowerShell (Admin). You can also search for PowerShell in the Start Search and then right-click on Windows PowerShell and select Run as administrator. Step 2: If a User Account Control or UAC prompt appears, just click Yes to proceed. Once you’ve pulled up Windows PowerShell, type the following command to get the List of Execution Policy for all the scopes on your computer.
Get-ExecutionPolicy –List
Step 3: After you execute the command, it will give you a list of the User Groups as well as their Execution Policy status, and under the Scope column, look for “LocalMachine”. Once you find its Execution Policy you will notice that it’s either set to Undefined or Restricted. Step 4: Now that you’ve determined the Execution Policy, you need to set it to Unrestricted if it is set to Restricted. To do that, you have to enter the following command in the very same PowerShell window.
Set-ExecutionPolicy Unrestricted
Step 5: After you execute the command, you will see a message that asks for various permissions for which you either have to tap Y to say Yes to each one of the messages individually or tap the A key to say Yes to all the messages to once. However, if the command throws another error, you can just force the Execution Policy to change by executing the following command.
Set-ExecutionPolicy Unrestricted -Force
Step 6: Once you’re done, it will finally set the Execution Policy for the Windows PowerShell scripts as well as cmdlets to be Unrestricted and fix the “File cannot be loaded because running scripts is disabled on this system” error.
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Blue Screen of Death in Windows

Symptoms of Blue Screen of Death Errors

Symptoms of a blue screen of death problem are easy to identify: if you have a blue screen error, then your computer will display a blue screen. Also known as the infamous “Blue Screen of Death”, this screen will pop up when something goes horribly wrong with your computer. The screen displays cryptic information about the problem before automatically restarting the system.

Bluescreen Of Death Errors Solution

Download Available To Completely Repair Blue Screen of Death Errors

Recommended: Download the Automatic Repair Utility to correct this and other PC performance issues.

Restoro box imageBluescreen Error Causes

This one can be a bit more complex: blue screens are caused by hundreds of different things. In fact, any miscommunication between the hardware and software of the computer can lead to the dreaded Blue Screen of Death, blue screens reference a communication problem between the Windows operating system and the hardware in your PC.

Why do computer blue screens of death errors occur?

Most computer users have experienced a blue screen of death at least once in their life. But have you ever stopped to wonder why they occur? Blue screens of death can occur for a number of different reasons, but the most common reason is that your PC’s hardware failed to properly communicate with its software, resulting in a fatal error. If your video card, processor, hard drive, or any other vital system component encountered a serious communication error with your operating system, then your PC may automatically display the blue screen and shut down for its own safety. Blue screens can also occur as a self-protection mechanism if the PC is overheated.

Further Information and Manual Repair

Where do Windows blue screen errors come from?

Blue screen errors come from many different sources on your computer. However, the majority of blue screen errors seem to come from the Windows Registry, which contains important configuration information about the programs, data, and personal files on your PC. Windows constantly rely on the registry in order to operate normally, but since the registry is incredibly complex (it holds hundreds of thousands of files), errors naturally develop over time. Fortunately, registry errors are fixable. They can be repaired using special registry cleaning software. During a scan, registry cleaning software looks for any registry entries that have errors. Once these entries are found, the software automatically repairs each entry. In many cases, this can permanently repair the blue screen error and prevent blue screens from ever appearing again.

Blue screen Windows 7

Windows 7, despite being Microsoft’s most popular operating system to date, is not immune to blue screen errors. It’s more stable than previous versions of Windows, although many users will inevitably encounter blue screen errors in Windows 7. No matter which version of Windows you’re currently using, the error remains the same: the hardware on your computer has trouble communicating with the software, forcing the system to display the blue error message we all love to hate.

“Blue Screen of Death”

There’s a reason this error message is famously called the “blue screen of death.” Immediately after displaying a blue screen, the Windows computer will ‘die’, which means that it restarts itself. Another reason why the error could be called the blue screen of death is that it is often displayed at the end of a PC’s life cycle. As PCs get older and their hardware starts to fail, blue screen errors become more and more common. In real life, death isn’t reversible. In the computer world, blue screens of death certainly are. With the right software support – like Restoro – even the most novice computer technician can fix their blue screen errors and restore their PC to healthy working conditions.

Benefits Of Using Restoro, BSOD Error Codes

Restoro is one of the world’s most popular PC optimization programs. Used by professional PC technicians around the world, Restoro is a feature-rich software suite that has helped many PC users breathe new life into an old PC. Restoro optimizes computer performance in hundreds of different ways. It looks through the registry and repairs any erroneous entries it finds. It also hunts down and eliminates malware and goes to work with the press of a button. And most importantly for you – it’s also amazingly effective at repairing blue screen errors. Ready to experience the Restoro difference? Here are a few more advantages of our favorite software program:
  • Easy for anyone to use: A few years ago, only the most tech-savvy individuals could optimize their computer’s performance.  Everybody else had to pay for expensive tech support or simply buy a new computer. Thankfully, the software development community has come up with innovations like Restoro which are easy for anyone to use. Just click a button and your computer will be clean within minutes. The process could not be easier.
  • Surprisingly fast: There are hundreds of thousands of files in the Windows Registry. In spite of that fact, Restoro goes to work incredibly quickly. It scans the depths of your PC in an effort to uncover whatever is causing your blue screen errors. The entire scan is complete within just a few minutes, making it easy for anyone to scan their computer on a regular basis.
  • Free trial: It’s good to be skeptical. And if you don’t think Restoro will fix any of the errors your computer is experiencing, then that’s okay. However, when you download the free Restoro, you can instantly scan your computer for errors. If any errors are found during this scan, then you can repair these problems with the click of a button.
  • Fixes frustrating errors: Blue screen errors are incredibly frustrating. You can’t get any work done on your computer when experiencing a blue screen problem. For that reason, Restoro helps alleviate some of the most frustrating PC problems in the world today.
  • More than just blue screen repairs: Sure, blue screens are annoying. But they’re only one of many different errors that a PC can develop over time. Fortunately, Restoro does more than just fix blue screen errors. The software also identifies and repairs other problem areas on your PC, making it easy to optimize performance.
Ready to get rid of your blue screen errors – permanently? Restoro today!
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How to Fix Windows Upgrade error 0xa0000400
If you encounter an error code of 0xa0000400 while trying to upgrade your Windows 10 computer using the Windows 10 Upgrade Assistant or the Windows 10 Media Creation Tool, then you might find this post useful as it will guide you in resolving this problem. When you get this error, you will see the following error message:
“Something went wrong You can contact Microsoft support for help with this error. Here is the error code 0xa0000400.”
As you know, keeping your computer up to date with all the Windows Updates is important and is imperative especially if you are experiencing a couple of issues like the Windows Upgrade error 0xa0000400. At the time of writing, there is no specific cause that has been found for this error. However, there are some potential fixes that might help you. You can try to recreate the Windows 10 installation USB and get the ISO files or you could also get a newer version of the Windows Media Creation Tool, or turn off your internet connection at a specific time or run the Windows Update troubleshooter. For more details, refer to the options given below.

Option 1 – Try to recreate the Windows 10 installation USB

Recreating the Windows 10 installation USB might help in fixing the problem. You can use a USB drive to do so but make sure that it has a great read-write speed. Follow the steps below to recreate Windows 10 installation USB”
  • Click this link and then click the Download Tool Now button.
  • Next, click the “Use the tool to create installation media (USB flash drive, DVD, or ISO file)…” option and follow the next given instructions on the screen.
  • Now select the ISO file option in step 5.
  • After that, you should now have an ISO file.
  • Next, go to the location where you’ve downloaded the ISO file.
  • Then right-click on the Windows 10 ISO file and select the Open with option and then select File Explorer.
  • Now click on “setup.exe” and follow the next instructions that appear on the screen. When asked, you have to select either Nothing (clean install) or Keep personal files only option. Take note that you must not select the “Keep personal files, apps, and Windows settings since it doesn’t really work.

Option 2 – Try turning off the Internet connection at a specific time

You might want to turn off your internet connection at a specific time. This option can be quite tricky so what you need to do is to disconnect the internet connection when the update is downloaded using the Windows Upgrade tool. It’s actually okay since all the files you need would be downloaded safely and the Windows Upgrade tool will be the one to install the newer updates using those files.

Option 3 – Try to get a newer version of the Windows Media Creation tool

You can also fix the Windows Upgrade error 0xa0000400 by using the latest version of the Windows Media Creation tool. And so if what you have is an older version, you need to update it in order to resolve the error and upgrade your Windows 10 computer.

Option 4 – Run the Windows Update Troubleshooter

Running the built-in Windows Update troubleshooter is one of the things you can first check out as it is known to automatically resolve any Windows Update or upgrade errors like error code 0x800701E3. To run it, go to Settings and then select Troubleshoot from the options. From there, click on Windows Update and then click the “Run the troubleshooter” button. After that, follow the next on-screen instructions and you should be good to go.

Option 5 – Try running Disk Cleanup

You might want to run the Disk Cleanup utility as it is a useful tool that could delete temporary and useless files in your computer.
  • Tap the Win + R keys to open the Run dialog box and then type “cleanmgr” in the field and hit Enter to open the Disk Cleanup window.
  • After that, select the drive you want to clean.
  • Now click OK to clean the disk and restart your computer.
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Advice when you have broken key on a keyboard
Having any kind of hardware malfunction is not a pleasant place to be. Even a minor malfunction like a broken key on a keyword can introduce certain bad feelings, frustration, and difficulty in working. So, what are your options when the dreaded key on the keyboard breaks? From my point of view, there are three options that could be accomplished in order to continue working.
  1. Replace broken keyboard with the new one

    Yes, the best and most expensive solution, just bite the bullet and buy a new working one.
  2. Replace key with another key

    So you broke some key, if you can replace it with another key which you do not use, this option will work only tho if the broken key is not Space bar, enter or similar with specific shape and size.
  3. Remap key

    use Windows power tools to remap key function to another working key
There you go, three options to continue working with a broken key on the keyboard.
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Fix Screen Aspect Ratio issues in Windows
There are times when you upgrade or install Windows 10 on an old computer and the Aspect Ratio of the screen is in a mess. This issue occurs when a new Windows version does not support the GPU or the driver does not work in Windows 10. And in such cases, Windows uses a generic driver which does not support all the resolution as well as the correct aspect ratio. So in this post, you will be guided on how you can fix the issues with the screen aspect ratio in Windows 10. It could be that your screen has an aspect ratio of 16:9 but after the upgrade, you changed to screen resolution, and is now set to 16:!0. And later on, you found that you are unable to go back to the previous aspect ratio. Thus, you will notice that everything on the screen might look stretched. You might be wondering if it’s possible to change the aspect ratio in Windows 10 directly even if the GPU does not have the compatible driver, well it really isn’t. However there is another way to resolve the problem. Refer to the options given below to get started.

Option 1 – Try using the Compatibility Mode

The first thing you can do is to run the driver in a Compatibility Mode. Follow the steps below to do so:
  • You need to download the driver and place it on your desktop.
  • After that, right-click on it and select Properties.
  • Next, switch to the Compatibility tab where you should see two options:
    • Compatibility troubleshooter, and let Windows figure out what works best for you. If it fails, follow the next.
    • Manually choose the version of Windows it was correctly working.
  • You also have the option to change the DPI settings and see if that helps. Then click the Apply and OK buttons.
  • Now right-click on the file and select the “Run as administrator” option to install. After that, you should now be able to change your screen aspect ratio to what you were using early on.
Note: If you have other programs that won’t work on the existing version of Windows, then make sure to run the program in a Compatibility mode.

Option 2 – Try to run the Program Compatibility Troubleshooter

You might also want to run the Program Compatibility Troubleshooter. This built-in troubleshooter is available in the Windows Update & Security section. From there, select Troubleshoot. This will find a list of programs for you and since you have already downloaded the driver files, just click on Not Listed located at the top of the program list. After that, browse and select the driver files and then let the program do its job.

Option 3 – Update or rollback your device drivers

If the first option didn’t work for you, then it’s time to either update or roll back the device drivers. It is most likely that after you updated your Windows computer that your driver also needs a refresh. On the other hand, if you have just updated your device drivers then you need to roll back the drivers to their previous versions. Whichever applies to you, refer to the steps below.
  • Open the Devices Manager from the Win X Menu.
  • Then locate the device drivers and right-click on them to open the Properties.
  • After that, switch to the Driver tab and click on the Uninstall Device button.
  • Follow the screen option to completely uninstall it.
  • Finally, restart your computer. It will just reinstall the device drivers automatically.
Note: You can install a dedicated driver on your computer in case you have it or you could also look for it directly from the website of the manufacturer.
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Completely Remove MixGames from Your Windows PC

mixGames is an Extension for Google Chrome that adds “Games:” functions to Google Chrome. In our testing, this function did not work and only redirects you back to the extension page. There are two variations of mixGames: mixGames Search, which changes the Chrome homepage to one managed by their own advertising-driven search; and mixGames Start, which changes the homepage in Chrome. These extensions utilize Searchalo to change search engine functions from the default or user-set preferences to Yahoo, injecting additional advertising. Due to the browser function modifications, mixGames is classified as potentially unwanted and is flagged for detection and optional removal by some Antivirus programs.

About Browser Hijackers

Browser hijacking is a common type of online fraud where your web browser configuration settings are altered to allow it to do things you do not intend. They are created to disrupt web browser programs for a variety of reasons. These are typically used to force hits to predetermined sites, manipulating web traffic to generate ad revenue. Nevertheless, it isn’t that innocent. Your internet safety is jeopardized and it is also extremely annoying. What’s more, hijackers can make the entire infected system fragile – other dangerous malware and viruses would use these opportunities to get into your system very easily.

Indications of browser hijack

There are various symptoms that could indicate a browser hijacking: 1. the browser’s home page is modified 2. new bookmarks pointing to pornographic websites are added to your favorite pages 3. the main web browser settings are modified and unwanted or unsafe resources are added to the trusted websites listing 4. you’re getting new toolbars you have never noticed before 5. your browser will display constant pop-up windows 6. your internet browser starts running sluggishly or exhibits frequent errors 7. you cannot go to certain sites like home pages of antivirus software.

Exactly how browser hijacker finds its way onto your computer

Browser hijackers infect computers by numerous means, including through a file-share, a drive-by download, or an infected e-mail attachment. Many internet browser hijackings come from add-on programs, i.e., browser helper objects (BHO), toolbars, or plug-ins added to web browsers to give them extra capabilities. A browser hijacker can be installed as a part of freeware, demoware, shareware, and fake programs. A good example of a well-known browser hijacker is the latest Chinese malicious software known as “Fireball”, which has infected 250 million computer systems globally. It works as a hijacker but can be turned into a full-functioning malware downloader later on. Browser hijacking can cause severe privacy problems and even identity theft, disrupt your web browsing experience by taking command over outbound traffic, substantially slows down your personal computer by depleting a lot of resources, and result in system instability at the same time.

How you can fix a browser hijack

Some hijackers can be easily removed by uninstalling the free software they were included with or by eliminating any extension you’ve recently added to your browser. But, the majority of hijacking codes aren’t easy to remove manually, since they go deeper into your operating system. Besides, browser hijackers can modify the Windows registry therefore it can be quite hard to restore all of the values manually, especially if you’re not a very tech-savvy individual.

How To Install Safebytes Anti-Malware On An Infected PC

All malware is bad and the consequences of the damage will vary according to the specific kind of malware. Certain malware types modify web browser settings by including a proxy server or change the computer’s DNS settings. In such cases, you will be unable to visit certain or all internet sites, and therefore unable to download or install the required security software to remove the infection. If you are reading this, you may have affected by a virus that stops you from downloading a computer security application like Safebytes Anti-Malware. Do as instructed below to remove malware by alternate methods.

Get rid of viruses in Safe Mode

In Safe Mode, you could modify Windows settings, uninstall or install some applications, and remove hard-to-delete viruses. In the event the malware is blocking internet access and affecting your computer, running it in Safe Mode allows you to download anti-malware and run a diagnostic scan while limiting possible damage. To get into Safe Mode or Safe Mode with Networking, press the F8 key while the PC is starting up or run MSConfig and find the “Safe Boot” options in the “Boot” tab. Once you are in Safe Mode, you can try to download and install your antivirus software program without the hindrance of the malware. Following installation, run the malware scanner to get rid of standard infections.

Switch over to an alternative browser

Some malware only targets specific internet browsers. If this sounds like your situation, make use of another internet browser as it could circumvent the computer virus. The ideal way to avoid this issue is to pick a web browser that is well known for its security features. Firefox contains built-in Malware and Phishing Protection to keep you secure online.

Create a portable USB antivirus for removing malware

Another option would be to make a portable antivirus program on your USB flash drive. Do these simple steps to clean up your affected computer using a portable antivirus. 1) On a clean computer, download and install Safebytes Anti-Malware. 2) Plug the USB drive into the uninfected computer. 3) Double-click the executable file to open the installation wizard. 4) Choose the drive letter of the pen drive as the location when the wizard asks you where you want to install the antivirus. Follow activation instructions. 5) Transfer the flash drive from the clean PC to the infected PC. 6) Double-click the EXE file to run the Safebytes program from the pen drive. 7) Run Full System Scan to detect and get rid of all types of malware.

Protect Your Computer & Privacy With SafeBytes Anti-Malware

These days, an anti-malware tool can protect your computer from different kinds of online threats. But how do choose the best one among several malware protection software that’s available on the market? You may be aware, there are lots of anti-malware companies and tools for you to consider. Some are well worth your money, but most aren’t. You have to be very careful not to choose the wrong application, especially if you purchase a paid software. Among few good applications, SafeBytes Anti-Malware is the highly recommended program for the security-conscious user. SafeBytes anti-malware is a powerful, very effective protection software intended to assist users of all levels of IT literacy in identifying and removing harmful threats out of their personal computers. Using its outstanding protection system, this software will quickly detect and remove the majority of the security threats, which include browser hijackers, viruses, adware, ransomware, PUPs, and trojans. SafeBytes anti-malware takes PC protection to a whole new level with its enhanced features. The following are some of the best ones: World-class AntiMalware Protection: Using its enhanced and sophisticated algorithm, this malware removal tool can identify and eliminate the malware threats hiding in your computer effectively. Active Protection: SafeBytes delivers complete and real-time security for your PC. It’ll constantly monitor your pc for hacker activity and also provides users with superior firewall protection. Website Filtering: Through its unique safety rating, SafeBytes alerts you whether a site is safe or not to visit it. This will assure that you’re always certain of your online safety when browsing the web. Faster Scan: This tool has one of the fastest and most efficient virus scanning engines in the industry. The scans are very accurate and take a short amount of time to complete. Low Memory/CPU Usage: SafeBytes is really lightweight software. It consumes an extremely small amount of processing power as it works in the background therefore you will not see any computer performance problems. 24/7 Assistance: You can get totally free 24/7 technical support from their computer experts on any product queries or computer security issues.

Technical Details and Manual Removal (Advanced Users)

If you do not wish to use malware removal software and like to remove mixGames manually, you may accomplish this by going to the Windows Add/Remove Programs menu in the control panel and removing the offending program; in cases of browser extensions, you could uninstall it by going to the browser’s Add-on/Extension manager. It is also suggested to factory reset your browser settings to their default state. Lastly, examine your hard disk for all of the following and clean your Windows registry manually to remove leftover application entries following an uninstallation. But bear in mind, this is a complicated task and only computer experts can perform it safely. In addition, certain malware is capable of replicating or preventing deletion. Completing this task in Safe Mode is recommended.
Registry: HKEY_CURRENT_USERSoftwareMicrosoftInternet ExplorerMain Default_Page_URL HKEY_LOCAL_MachineSoftwareClassesmixGame HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRun .exe HKCUSoftwareMicrosoftWindowsCurrentVersionInternet Settingsrandom HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionrunrandom HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionInternet Settings CertificateRevocation = ’0
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How to Fix CoreFoundation dll Error

CoreFoundation dll Error – What is it?

The CoreFoundation dll error is a common error associated with Apple Software products. Most of the Apple Software products rely on this dll file to load and run. This dll file is Apple’s proprietary. The error message is prompted in the following format:
“CoreFoundation.dll was not found” or “Apple Application Support is missing’.

Solution

Restoro box imageError Causes

The CoreFoundation.dll error message is triggered because of several reasons. These include:
  • Deleted CoreFoundation dll file
  • The CoreFoundation dll file has been overwritten
  • Poor installation of the Apple software
  • Corrupt software due to viral infection
  • Registry problems

Further Information and Manual Repair

It is advisable to fix CoreFoundation dll error code right away to avoid inconvenience. This error may stop you from accessing and running your desired Apple application. Here are some of the best ways to resolve this error on your system:

1. Restore the Deleted CoreFoundation dll File

Since Dynamic Link Library is a shared program, if you happen to delete an Apple program on your PC, chances are you might have deleted that file too in the process. Therefore, the easiest way to recover and restore the CoreFoundation dll file and resolve the error is to look for the file in the recycle bin. If you can’t locate it, then another way to restore the missing CoreFoundation dll file is to download the files from the internet.

2. Reinstall  Apple Software

If the error still persists then it is advisable to re-install Apple software via iTunes or any other Apple Software that you have on your PC. For example, if you have iTunes, then to reinstall it first go to the start menu and then the control panel. Now click on Add/Remove programs and locate iTunes software. Click the Uninstall button next to iTunes. Wait for a while until the program is completely uninstalled. After the installation is complete, restart your PC and then download the latest version on iTunes and install it. Now try running the software again. Hopefully, this will resolve the issue.

3. Scan for Viruses

Another way to resolve CoreFoundation dll error on your system is to scan for viruses. Run an antivirus to detect viruses and remove them from your PC.

4. Clean Your Registry

Remember DLL file errors also indicate a corrupt registry. When you don’t clean the registry it overloads with unnecessary and obsolete files like junk files, cookies, temporary internet history, and bad /invalid registry entries. When these files accumulate, they damage the registry, dll, and system files too. It also causes disk fragmentation. To repair the registry and fix dll files again, download a registry cleaner. Whether you want to scan for viruses or clean the registry, it is advisable to download Restoro. This is a multi-functional and advanced PC Fixer deployed with an intuitive algorithm and multiple powerful utilities. These include an antivirus, a registry cleaner, Active X controls, and class scanner, and a system optimizer. The registry cleaner detects all registry issues and resolves them instantly. It wipes out the unnecessary files cluttering and damaging the registry. It fixes and restores the damaged dll files including CoreFoundation dll file thereby resolving the error. It takes a few clicks to resolve this error. The antivirus feature scans your entire PC and removes all kinds of malicious software including spyware, malware, viruses, and Trojans. To ensure the antivirus does not slow down the speed of your PC, Restoro also features a system optimizer that boosts the performance of your computer significantly. It is powerful and bug-free software with a user-friendly interface that makes it quite easy to operate. You can download it on any Windows version as it is compatible with all. Click here to download Restoro and resolve CoreFoundation dll error now!
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Fix ERR_SSL_VERSION_INTERFERENCE on Chrome
If you encounter the ERR_SSL_VERSION_INTERFERENCE error on your Google Chrome browser then this means that the browser is trying to load a website with SSL protocol but is not able to do so. This error can occur for many reasons and in this post, you will be given potential fixes that could help you in resolving the problem. But bear in mind that these potential fixes are not that straightforward forward so if you encounter an option you don’t understand much, just skip to the options you have the knowledge of. There is no direct fault in the browser for the ERR_SSL_VERSION_INTERFERENCE error as there are issues with caching the website data locally on your computer. Moreover, this kind of error can also appear when a website is coded incorrectly or if there are conflicting browser extensions installed in the browser that prevents the website to function properly. Refer to the suggestions given below to fix the ERR_SSL_VERSION_INTERFERENCE error in Chrome on Windows 10.

Option 1 – Try clearing browser data

There are times when some data in the browser is conflicting with the loading of the website and triggers errors like ERR_CACHE_MISS. And so you can try to clear your browser’s data. This might be a very basic solution but oftentimes it works in fixing this kind of error in Google Chrome. Follow the steps below to clear the data in your browser.
  • Open your Google Chrome browser.
  • After that, tap the Ctrl + H keys. Doing so will open a new panel that allows you to delete the browsing history and other data in your browser.
  • Now select every checkbox that you see and click on the Clear browsing data button.
  • Then restart your Chrome browser and check if you can now open any website or not.

Option 2 – Try disabling TSL 1.3

If clearing the browser data didn’t fix the problem, you can also try to disable TSL 1.3 in Chrome. To do so, refer to these steps:
  • Open Google Chrome.
  • Next, type in “chrome://flags/#tls13-variant” in the address bar and tap Enter.
  • After that, you should see the experimental features page for Google Chrome where you can set TSL 1.3 to disabled.
  • After disabling TSL 1.3, restart your computer and check if the problem is fixed or not.

Option 3 – Reset Winsock, TCP/IP & Flush DNS cache

Resetting Winsock, TCP/IP, and flushing DNS might help in resolving the ERR_SSL_VERSION_INTERFERENCE error just follow these steps:
  • Right-click on the Start button and click on Command Prompt (administrator) so you can pull up an elevated Command Prompt.
  • After that, execute each one of the commands listed below. And after you typed in one after the other, you have to hit Enter.
  1. netsh winsock reset – type in this command to reset Winsock
  2. netsh int ip reset resettcpip.txt – type in this command to reset TCP/IP
  3. ipconfig /flushdns – type in this command to flush the DNS cache
  • Next, restart your PC and check if the problem’s fixed.

Option 4 – Get rid of any conflicting browser extensions

  • Open Chrome and press Alt + F keys.
  • Go to More tools and click Extensions to look for any suspicious browser extensions or toolbars.
  • Click the Recycle bin and select Remove.
  • Restart Chrome and press Alt + F keys again.
  • Proceed to On Startup and mark Open a specific page or set of pages.
  • To check if the browser hijacker is still active, click Set pages, if it is active, overwrite the URL.

Option 5 – Reset Google Chrome

Resetting Chrome can also help you get rid of the error. Resetting Chrome will restore its default settings, disabling all the extensions, add-ons, and themes. Aside from that, the content settings will be reset as well and the cookies, cache, and site data will also be deleted. To reset Chrome, here’s what you have to do:
  • Open Google Chrome, then tap the Alt + F keys.
  • After that, click on Settings.
  • Next, scroll down until you see the Advanced option, once you see it, click on it.
  • After clicking the Advanced option, go to the “Restore and clean up option and click on the “Restore settings to their original defaults” option to reset Google Chrome.
  • Now restart Google Chrome.
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Fix 169 IP address error in Windows 10
169 IP address error can stop your computer from connecting to the internet which could be a very frustrating experience. In this guide, we will cover simple but effective tips on how to fix this error so you can continue with internet use.
  1. Reconnect your Modem or Router

    Simple and sometimes effective solution, unplug and plug back in modem or router so IP is fetched again, it is very likely that computer will pick right IP address with this stunt.
  2. Use built-in Windows Network troubleshooter

    Press ⊞ WINDOWS + X top open secret menu Go to settings Go to Network & Internet Inside click on Network troubleshooter Follow onscreen instructions After the troubleshooter ends reboot your PC
  3. Reconfigure IP address

    Press ⊞ WINDOWS + R to open the run dialog Inside run dialog type ncpa.clp and press ENTER Right-click on your network adapter and select properties Uncheck Internet Protocol Version 6 (TCP/IPv6) and click on OK Now press ⊞ WINDOWS + X and click on Command prompt (admin) In command prompt type and after each line press ENTER netsh winsock reset catalog netsh int ip reset reset.log ipconfig /release ipconfig /renew Reboot your computer
  4. Restart DHCP client

    Press ⊞ WINDOWS + R to open the run dialog In run dialog type services.msc and click on OK Find DHCP client Right-click on it and choose Restart Reboot PC
  5. Reinstall Network Adapter

    Press ⊞ WINDOWS + X to open the windows menu Click on Device Manager Expand Network Adapter and right-click on wireless or ethernet adapter, click on Uninstall device Reboot the computer to automatically reinstall the device driver
  6. Reset IP and subnet mask

    Press ⊞ WINDOWS + R to open the run dialog In run dialog type in ncpa.cpl and press OK Right-click on your network adapter and select properties Uncheck Internet Protocol Version 6 (TCP/IPv6) Double click on Internet Protocol Version 4 (TCP/IPv4) Select Use the following IP address and change it to 192.168.0.1 Change Subnet mask to 255.255.255.0 Leave default gateway blank Click OK to save changes
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