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.

Do You Need Help with Your Device?

Our Team of Experts May Help
Troubleshoot.Tech Experts are There for You!
Replace damaged files
Restore performance
Free disk space
Remove Malware
Protects WEB browser
Remove Viruses
Stop PC freezing
GET HELP
Troubleshoot.Tech experts work with all versions of Microsoft Windows including Windows 11, with Android, Mac, and more.

Share this article:

You might also like

Patching Error Code 21

Code 21 - What is it?

Code 21 is a Device Manager error code that appears when you try to use a hardware device attached to your computer and the Windows prohibits you from using it.

This is due to the Windows experiences problems loading the device driver. This error message is displayed in the following format:

“Windows is removing this device. (Code 21)”

Solution

driverfix boxError Causes

Error code 21 means that Windows is in the device removal process and the device has not been completely removed. It occurs when you set a device to be removed and then select the same device to run on your system.

Upon your instructions, Windows start to remove that device and when you on the other hand try to use/access the same device that you selected for removal, it kicks up Code 21.

Further Information and Manual Repair

If you are experiencing error code 21 on your PC, it is advisable to resolve it immediately.

Though this error will not damage your system, but will significantly lower the performance of your PC which is definitely something you don’t want especially if you work on your computer daily and use it to perform important time-sensitive errands.

To repair and resolve, try the methods given below:

Method 1 - Wait for a Few Seconds and Then Press F5

This is one of the best and easiest ways to resolve code 15 on your system. Wait for a few seconds, and then press the F5 key. This will update the Device Manager view and the error will most probably go away.

Method 2 - Restart Your PC

Sometimes error codes may pop up due to temporary glitches. To resolve such errors, a simple reboot of your PC is enough. Shut down Windows and then restart your system.

This is most likely to resolve Code 21. However, if the error still persists then this means the underlying problem for code 21 is deeper than you think. Try method 3 to resolve.

Method 3 - Install DriverFIX

As mentioned earlier, the error code 21 may occur if you have selected a device to remove and then you try to reuse it.

To resolve, you may have to install the device again and the driver for that the reinstalled device. To reinstall the driver without any hassle, simply download DriverFIX.

It is a smart, user-friendly, and intuitive software program designed to resolve driver problems. The program is embedded with intelligent device identification technology which:

  • Automatically detects all the appropriate system drivers
  • Matches them with the latest available versions
  • And then updates drivers according to their compatible versions on a regular basis

Furthermore, it enables accurate installation and ensures that your system is running at its optimal speed.

Other features that this program boasts are full backup and restoration, safe USB management, and ejection.

If nothing works, you can try the full backup and restoration feature and restore your PC to its previous state when it was functioning properly before the error occurred.

DriverFIX creates a backup of all your files and data hedging keeps you from disasters like data loss. It restores the system to the time when it was working properly.

Click here to download DriverFIX on your system and resolve error code 21 today.

Read More
PrivacyAssistant Malware Removal Tutorial

PrivacyAssistant is a browser extension developed by SearchAssistant.net. These extensions allegedly offer users a safer way to browse the internet and some other tools to customize the home page with background wallpapers and one-click links that can be added. While all this may sound appealing, PrivacyAssistant also monitors your browser activity, search quarries, clicks, visits, and possibly personal information.

This extension changes your default home page to SearchAssistant.com and rerouting all searches through its search portal, displaying sponsored links instead of your typical search results. While active you may see unwanted ads and even pop-up ads appearing while browsing the internet.

Several anti-virus programs have classified this extension as a Browser Hijacker, and are, therefore, for security reasons, not recommended to keep on your computer.

About Browser Hijackers

Browser hijacking is amongst the web’s constant risks that target internet browsers. It’s a kind of malicious software that alters your internet browser’s configuration settings and redirects you to websites or pages that you had no intention of checking out. They are created to disrupt browser functions for many different reasons. Usually, hijackers will force hits to internet sites of their choice either to increase traffic producing higher advertisement earnings, or to gain a commission for each and every user visiting there. Most people believe that these kinds of websites are legitimate and harmless but that is not the case. Almost every browser hijacker poses an existent threat to your online safety and it’s important to categorize them under privacy dangers. When the program attacks your PC, it starts to mess things up a whole that slows your computer down to a crawl. In the worst-case scenario, you might be forced to deal with serious malware threats as well.

How one can recognize a browser hijack

There are numerous symptoms that point to a browser hijacking: your browser’s home page is suddenly different; you get re-directed to sites you never meant to visit; the default web engine has been changed and your web browser security settings have been lowered without your knowledge; find new toolbars that you simply did not add; you might find many pop-up ads on your computer screen; your web browser starts running slowly or displays frequent errors; you have prohibited entry to certain web pages, for example, the website of an antivirus software developer like SafeBytes.

So how exactly does a browser hijacker infect a PC

Browser hijackers may use drive-by downloads or file-sharing websites or perhaps an email attachment in order to reach a targeted computer system. They can also originate from any BHO, extension, toolbar, add-on, or plug-in with malicious intent. Other times you might have unintentionally accepted a browser hijacker as part of a software program bundle (generally freeware or shareware). A good example of some popular browser hijackers includes Conduit, Anyprotect, Babylon, DefaultTab, SweetPage, Delta Search, and RocketTab, however, the names are constantly changing. Browser hijacking can lead to serious privacy problems and even identity theft, disrupt your browsing experience by taking control over outgoing traffic, considerably slows down your personal computer by consuming lots of system resources, and result in system instability at the same time.

How to repair a browser hijack

Some hijackers can be removed by uninstalling the free software they were included with or by deleting any extension you’ve recently added to your browser. But, the majority of hijackers are extremely tenacious and require specialized applications to eradicate them. Furthermore, manual removal requires you to execute many time-consuming and tricky procedures which are hard to carry out for inexperienced computer users.

How To Get Rid Of Virus That Is Preventing Antivirus Installation?

Viruses can cause a great deal of damage to your computer system. Some malware sits in between the computer and your net connection and blocks some or all sites that you really want to visit. It will also prevent you from installing anything on your computer, especially anti-malware software. So what to do if malicious software keeps you from downloading or installing Safebytes Anti-Malware? Although this sort of problem can be difficult to circumvent, there are some actions you can take.

Make use of Safe Mode to resolve the problem

In Safe Mode, you can actually change Windows settings, un-install or install some software, and eliminate hard-to-delete malware. In case the malware is set to load immediately when PC boots, switching into this mode may well prevent it from doing so. To enter into Safe Mode or Safe Mode with Networking, press F8 while the system is starting up or run MSCONFIG and look for the “Safe Boot” options in the “Boot” tab. Once you’re in safe mode, you can try to install your anti-malware program without the hindrance of the malicious software. Following installation, run the malware scanner to remove most standard infections.

Switch over to some other web browser

Some malware mainly targets specific browsers. If this is your situation, use another internet browser as it can circumvent the malware. In the event you suspect that your Internet Explorer has been hijacked by a computer virus or otherwise compromised by cybercriminals, the best approach is to switch over to a different internet browser like Mozilla Firefox, Google Chrome, or Apple Safari to download your favorite computer security program – Safebytes Anti-Malware.

Run anti-virus from a USB drive

Another solution is to create a portable anti-malware program on your USB thumb drive. Try these simple actions to clean up your affected PC using a portable antivirus. 1) Download Safebytes Anti-Malware or Microsoft Windows Defender Offline onto a clean computer system. 2) Plug the pen drive into the uninfected PC. 3) Run the setup program by double-clicking the executable file of the downloaded application, which has a .exe file format. 4) Choose the flash drive as the location for saving the file. Follow the on-screen instructions to complete the installation process. 5) Transfer the pen drive from the uninfected computer to the infected computer. 6) Double-click the EXE file to open the Safebytes tool from the pen drive. 7) Click “Scan Now” to run a scan on the infected computer for viruses.

A Look at the Best AntiMalware Program

If you are looking to download an anti-malware application for your computer, there are several tools out there to consider nonetheless, you cannot trust blindly anyone, no matter whether it is paid or free software. Some are really worth your money, but many aren’t. While looking for an anti-malware program, choose one that offers solid, efficient, and complete protection against all known computer viruses and malware. One of the highly recommended software is SafeBytes AntiMalware. SafeBytes carries a very good track record of quality service, and customers appear to be happy with it. SafeBytes anti-malware is really a powerful, very effective protection tool created to assist users of all levels of IT literacy in finding and eliminating malicious threats out of their PC. Once you’ve got installed this software, SafeByte's state-of-the-art protection system will make sure that no viruses or malicious software can seep through your PC. SafeBytes anti-malware comes with a plethora of enhanced features which sets it aside from all others. Listed below are some of the highlighted features included in the tool. Robust Anti-malware Protection: This deep-cleaning anti-malware software goes much deeper than most anti-virus tools to clean your computer. Its critically acclaimed virus engine finds and disables hard to remove malware that conceals deep inside your personal computer. Active Protection: SafeBytes gives round-the-clock protection for your PC limiting malware attacks in real-time. They’re extremely effective in screening and removing various threats since they’re constantly improved with the latest updates and alerts. Web protection: SafeBytes checks the links present on a web page for possible threats and alerts you whether the website is safe to explore or not, through its unique safety ranking system. Light-weight: The program is lightweight and will work quietly in the background, and that does not impact your computer efficiency. 24/7 Premium Support: Support service is readily available for 24 x 7 x 365 days through email and chats to answer your queries.

Technical Details and Manual Removal (Advanced Users)

If you wish to manually remove PrivacyAssistant without the use of an automated tool, it may be possible to do so by removing the program from the Windows Add/Remove Programs menu, or in cases of browser extensions, going to the browsers AddOn/Extension manager and removing it. You will likely also want to reset your browser. To ensure the complete removal, manually check your hard drive and registry for all of the following and remove or reset the values accordingly. Please note that this is for advanced users only and may be difficult, with incorrect file removal causing additional PC errors. In addition, some malware is capable of replicating or preventing deletion. Doing this in Safe Mode is advised.

The following files, folders, and registry entries are created or modified by PrivacyAssistant

Registry: HKLMSOFTWAREClassesAppID.exe HKEY_CURRENT_USERsoftwareMicrosoftInternet ExplorerMainStart Page Redirect=http://.com HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionvirus name HKEY_CURRENT_USERSoftwareMicrosoftWindows NTCurrentVersionWinlogon Shell = %AppData%.exe HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRun Random HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionRandom HKEY_LOCAL_MACHINESOFTWAREsupWPM HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesWpm HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionUninstallPrivacyAssist HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionImage File Execution Optionsmsseces.exe HKLMSOFTWAREClassesAppIDrandom.exe HKEY_CURRENT_USERSoftwareMicrosoftInternet ExplorerMain Default_Page_URL
Read More
Fix 0xc00d36cb error in Windows 10
0xc00d36cb error shows up when you are trying to play a video or movie using the default player in Windows. This error can occur due to a glitch in the media player or corrupted system files. in this guide, we will show you how to tackle this issue and fix it.
  1. Run the video playback troubleshooter

    • Click on Start and select Settings.
    • Go to Update and Security.
    • Scroll down and open the Troubleshoot tab.
    • Scroll down and select the Video Playback option.
    • Click the Run the Troubleshooter button.
    • The troubleshooter will perform an initial scan and offer a few options.
    • Select Continue with this troubleshooter.
    • The troubleshooter will scan the system again for driver and codec issues.
    • Follow on-screen instructions and apply recommended fixes.
  2. Reset the Movies and TV app

    • Click on Start and select Settings.
    • Go to Apps and open the Apps and features tab.
    • Scroll down to Movies and TV.
    • Select Movies and TV.
    • Click Advanced options.
    • Scroll down and click on the Reset button.
  3. Create a new user account

    • Click on Start and select Settings.
    • Open Accounts.
    • Open the Family & other users tab.
    • Scroll down to Other users and click the Add someone else to this PC button.
    • In the Microsoft account window, type your email address.
    • If you don’t want to enter an email address and establish a local account, click on I don’t have this person’s sign-in information option instead.
    • Next, select Add a user without a Microsoft account (for a local account).
      • Else, enter your Microsoft account login details.
    • Enter a user name and password for your new account. Also, select a security question and add an answer to it.
    • Once the new profile is ready, log out of your current account.
  4. Check for permission issues

    • Right-click on the problematic file and select Properties.
    • Open the Security tab.
    • Click the Advanced button.
    • In the Advanced Security Setting window, click the Change link.
    • In the Select User or Group window, enter Everyone in the text box.
    • Click the Check Names button.
    • Click OK and Apply to save the changes.
    • Close all the Properties windows.
    • Try playing the file or modifying the properties and check for any improvements.
Read More
How to Fix 0x0000007B Error

What is 0x0000007B Error?

0x0000007B is the most common Windows stop error. The error is displayed on the blue-colored screen which is also called the blue screen of death. You may receive a 0x0000007B error message during Windows XP setup or while running the setup program. The message is often displayed as ‘a problem has been detected and Windows has been shut down to prevent damages’ or ‘inaccessible boot device error’.

Solution

Restoro box imageError Causes

The 0x0000007B error code is usually triggered by:
  • Poor Window XP installation
  • Registry corruption
  • Device Drivers Issues
  • Boot sector viruses

Further Information and Manual Repair

The 0x0000007B error makes your system vulnerable and reduces its speed significantly. And besides, you can’t run the programs smoothly on your PC either. Therefore, it’s advisable to fix the error right away. To fix and repair the 0x0000007B error successfully, you must first understand the cause of the error. Let’s take a look at all the solutions available to fix the 0x0000007B error.

Cause: Boot Sector Viruses

Solution: If your computer is infected with boot sector viruses, then you will first have to download a powerful antivirus. After downloading the antivirus program, run it on your PC to check your computer for viruses. Delete the viruses found and click the repair option. Sometimes even an antivirus program may fail to remove the virus and repair the system. In such cases, you must repartition and format your hard disk and also reinstall Windows XP.

Cause: Device Driver Issues

Solution: Device driver issues may occur if the boot controller is not properly configured or the driver is not up to date. If device driver configuration is the cause of the 0x0000007B error on your PC, then all you need to do is restart your PC, and while restarting press F8 to go to the advanced boot options. Now choose the ‘Last Known Good Configuration’ option. After selecting it, boot into windows and then perform a system restore. Now go to Device Manager and perform a driver rollback to reinstall the drivers. This will resolve the configuration issues. However, if you need an updated driver, all you need to do go on the web and download software to update the driver. It is advisable to download software from the manufacturer’s website in order to successfully update the device driver.

Cause: Poor Windows Installation

Solution: In this case, you will have to perform a Windows start-up repair. To do this: boot Windows XP from CD. Press ‘enter’ at setup Windows Screen when prompted. Then press R to repair Windows Installation. This procedure will not delete any user data and files. In fact, it will copy only the original Windows files over the bad or existing ones. Some of the best ways to avoid Ox0000007B blue screen errors are
  • To scan for viruses every time you use your PC
  • Never open web pages, emails, or download content that you think looks suspicious because that’s probably a virus.
  • Always keep your computer updated.
Read More
See if your Data is safe in Facebook breach
It is no secret that a few days ago Facebook has been breach and tons of user accounts have been compromised. These kinds of things are very unpleasant experiences for both users and the company itself. User trust lowers significantly in the company and it can greatly increase the chances of users migrating to another platform. This just shows how much a hacker or security breach can produce damage to the business. Sadly we can not offer you guidance or assistance in recovering your stolen data nor can we provide you with removing your data from the hands of the attacker. What we can do is to provide you with information has your data been stolen. Threat actor released the personal information for 533,313,128 Facebook users on a hacking forum, including mobile numbers, name, gender, location, relationship status, occupation, date of birth, and email addresses. This data was originally sold in private sales after being collected in 2019 using a bug in the 'Add Friend' feature on Facebook. Facebook had closed this vulnerability soon after it was discovered, but threat actors continued to circulate the data until it was finally released practically for free. Since then, Troy Hunt has added the leaked data to his Have I Been Pwned data breach notification service to help users determine if a Facebook member's data was exposed in the leak. Go to the site and enter your email address to check and see if your data has been compromised.
Read More
Reddit released the application in MS store
Reddit appReddit is one of the most popular websites in the world and how Microsoft is opening doors to everyone in its new store Reddit took a logical step and made a Progressive web application and placed it in it. Being a Progressive web app makes it more familiar and feels like a home experience using it for a lot of Reddit users. Reddit itself has a large community and active topics discussions all the time about anything. Bringing it to Windows as an application is, in my opinion, a great move since as an application it is independent, more light-weighted, and offering some other advantages specifically tied to being a standalone windows application. Everyone familiar with and using the Reddit website will feel right at home in this app and you can start using it right away.
Read More
How to Repair BSOD Stop Error code 0xc000021a in Windows 10

Error code 0xc000021a - What is it?

Error code 0xc000021a occurs when the system is unable to start or there’s a failure in critical system processes. Normally, it would take about several seconds for the system to boot and while on the startup process, error code 0xc000021a may take place to block the system to boot up. Users will get a blue screen of death (BOSD) when this error occurs. When upgrading to Windows 10, be careful; you might encounter other error messages such as error code 8007002c

Solution

Restoro box imageError Causes

There are several reasons why error code 0xc000021a occurs. It is important to have a full understanding of what caused the blue screen of death before attempting to fix the error by yourself. See below for a few common causes:

Computer malware has infiltrated your device.

• Important files such as Winlogon.exe and Csrss.exe are damaged. Winlogon.exe file is responsible for handling the login and logout processes while Csrss.exe is a vital part of Microsoft Client or Server ‘Runtime Server Subsystem’. Once one of these files is damaged or deleted, a stop error will occur.

• When there are mismatched system files installed or system upgrading process failed or still incomplete.

• Premature unloading of Wbemprox.dll

• Newly installed third-party software is not compatible with the operating system.

• There are corrupted, outdated, or incorrectly configured device drivers.

• There’s insufficient space in the system partition. Once the system partition is full, certain errors such as error code 0xc000021a will manifest.

• Windows registry is corrupted or damaged due to a software or system change. This means there are registry entries that are not cleared after uninstalling an application.

Further Information and Manual Repair

In fixing error code 0xc000021a, you might want to try and manually do so. Manual repair methods can give users effective and efficient solutions, addressing the root problems in relation to Windows error codes. Once the manual repair method is correctly implemented, users will be able to resolve issues immediately. However, there might be instances when a Windows professional is needed. In such cases, seek help from a certified Windows expert or you might want to consider using an automated tool whenever necessary.

Method One: Convert the Drive or Partition from NTFS to GPT

In order to fix Error code 0xc000021a in Windows 10, you might need to convert the partition or drive from NTFS to GPT. See below for the procedure: 1. Shut down your device then put in the Windows installation USB key or DVD. 2. Boot your device to the USB key or DVD in UEFI mode. 3. Inside the Windows Setup, open a Command Prompt window by pressing Shift + F10. 4. Type diskpart in the Command Prompt window to open the diskpart tool. 5. Type list disk to identify which drive to reformat. 6. Select which drive to reformat by typing select disk in the command prompt. Afterward, type clean then hit Enter. Once done, type convert gpt to be able to convert the drive from NTFS to GPT. Finally, type exit and press Enter. You can now close the Command Prompt window. 7. Once the partition or drive is converted from NTFS to GPT, the user can now continue the Windows Setup installation. NOTE: Select Custom in choosing which installation type to use. The drive will then appear as a single area of unallocated space. Choose that unallocated space then select Next. At this point, Windows will now begin the installation.

Method Two: Fix System File Errors

There are times when system files get corrupted or damaged which will result in system failure. If this is the case, you can use a Windows free tool to repair corrupted or damaged system files. 1. Right-click on the Start button then selects Command Prompt (Admin) from the list to open a Command Prompt window. 2. Once the Command Prompt appears, type sfc /scannow then hit Enter. Wait until the process completes. If the process is completed and it doesn’t report any error or issues that remain unsolved, you might want to employ the next method.

Method Three: Reset Windows 10

Resetting Windows will delete all software and user accounts installed in the operating system and will reinstall a fresh Windows. 1. Boot your device using a Windows installation USB key or DVD. Select Repair your computer to locate the Troubleshoot option. Afterward, choose Reset this PC. NOTE: If the device is able to boot the system, you can reset Windows without using a Windows installation USB key or DVD. You just have to boot the device then navigate to Settings in the Start button. Choose Update & Recovery then select Recovery found on the left pane. Choose Reset this PC option then select Go back to an earlier build and Advanced startup. Select Get Started button found in the Reset this PC tab. 2. Depending on your device’s condition, you can either select Keep my files or Remove everything. Both options will remove all applications installed in the device and will revert to default settings. 3. Choose either Just remove my files or Remove files and clean the drive depending on the situation. If you choose the Remove files and clean the drive option, the procedure will take longer as it will erase all the files permanently. In this case, deleted files cannot be recovered. However, if you don’t want to remove files permanently, select Just remove my files. 4. Once you’ve decided how to reset your system, click on Next once the Warning screen appears. Afterward, choose Reset once prompted. When the process completed, click on Continue.

Method Four: Download an Automated Tool

Can’t seem to put up with the long and technical manual repair process? You can still fix this error by downloading and installing a powerful automated tool that will surely get the job done in a jiffy!
Read More
Telnet not recognized as internal/external
In case you don’t know, a teletype network, also known as Telnet, is a protocol that is meant for internet or LAN communication which is used primarily to control other computers effortlessly. And it is available as a command-line utility in Windows and helps users in opening a command-line interface for the remote computer. However, a lot of users have reported an error that states, “Telnet is not recognized as an internal or external command, operable program, or batch file” when you try to use it. If you are one of these users, then you’ve come to the right place as this post will guide you on how to fix this error in Windows 10. This kind of error means that the Telnet utility is not installed on your computer but Telnet is a default feature in Windows 10 so the protocol mainly is not enabled yet. The Telnet client is disabled by default in Windows 10 and to fix this error, you can try to enable the Telnet Client via Programs and Features or try to install Telnet using an elevated Command Prompt.

Option 1 – Try to enable the Telnet Client via Programs and Features

The first thing you can do is to enable the Telnet client using Programs and Features since it is disabled by default. To do that, follow the steps below.
  • Tap the Win + R keys to open the Run dialog box and type “appwiz.cpl” in the field and hit Enter to open the Programs and Features window.
  • Next, select the “Turn Windows features on or off” from the options given on the left-hand side.
  • After that, look for the Telnet client from the list and check the checkbox next to it and then click on OK to save the changes made.
  • Now restart your computer.

Option 2 – Try to install Telnet via an elevated Command Prompt

If enabling the Telnet client using Programs and Features didn’t work, then you can try to do it using Command Prompt instead. To get started, follow the steps given below.
  • In the Windows Search bar, type “command prompt” in the field and right-click on Command Prompt from the search results, and select the “Run as administrator” option.
  • Next, execute this command to enable the Telnet client: dism /online /Enable-Feature /FeatureName:TelnetClient
  • Once the command has been executed, close the Command Prompt and restart your computer.
Read More
How to Fix UNEXPECTED_KERNEL_MODE_TRAP error
It is a fact that Blue Screen of Death errors can give you a headache for you will have a hard time fixing it as it is one of the most difficult errors you can encounter on your Windows computer. One of these BSOD errors is the UNEXPECTED KERNEL MODE TRAP error. If you receive this kind of error then it means that the operating system was not able to catch a trap or an exception generated by the CPU. This BSOD error has an error code 0x00000007F and indicates that the Intel CPU generated a trap that the kernel failed to catch. One of the most likely causes is hardware failure due to faulty memory. Aside from this cause, you also have to track down other probable causes for this problem like corrupted system files, incompatible drivers or programs, faulty hardware, and even dusty components, and so on. To fix the UNEXPECTED KERNEL MODE TRAP BSOD error, here are some suggestions that might help.

Option 1 – Uninstall the programs you installed recently

Chances are, some programs that you just installed might be the one that’s causing the BSOD error. Thus, you need to uninstall the program to resolve the problem.
  • In the search box, type in “control” and then click on Control Panel (desktop app) among the search results.
  • After that, select Programs and Features from the list which will give you a list of all the programs installed on your computer.
  • From there, look for the concerned program and select it and then uninstall it.
Note: If you have downloaded the app from the Windows Store, you can simply right-click on it from the application list and then uninstall it. In addition, you might also want to check the hardware components of your computer that might not support the operating system itself. You can disconnect all the external devices like USB drives, scanners, printers, etc., and then reboot your PC. After that, add the devices again one after the other and check if the BSOD error is now fixed or not. Moreover, you can also perform a clean boot to make things easier for you.
  • Log onto your PC as an administrator.
  • Type in MSConfig in the Start Search to open the System Configuration utility.
  • From there, go to the General tab and click “Selective startup”.
  • Clear the “Load Startup items” checkbox and make sure that the “Load System Services” and “Use Original boot configuration” options are checked.
  • Next, click the Services tab and select the “Hide All Microsoft Services” checkbox.
  • Click Disable all.
  • Click on Apply/OK and restart your PC. (This will put your PC into a Clean Boot State. And configure Windows to use the usual startup, just simply undo the changes.)

Option 2 – Update your device drivers

  • Tap the Win + R keys to launch Run.
  • Type in devmgmt.msc into the box and tap Enter or click OK to open the Device Manager.
  • After that, a list of device drivers will be displayed. Look for the device driver you and then select either “Update driver” or “Uninstall device”. And if you find any “Unknown device”, you need to update it as well.
  • Select the “Search automatically for updated driver software” option and then follow the instructions to complete the process.
  • If you have chosen to uninstall the driver, follow the screen options to complete the process and then restart your PC.
  • Connect the device and Scan for hardware changes – you can see this option under Device Manager > Action.

Option 3 – Use the Blue Screen Troubleshooter

The Blue Screen troubleshooter is a built-in tool in Windows 10 that helps users in fixing BSOD errors like UNEXPECTED KERNEL MODE TRAP. It can be found on the Settings Troubleshooters page. To use it, refer to these steps:
  • Tap the Win + I keys to open the Settings panel.
  • Then go to Update & Security > Troubleshoot.
  • From there, look for the option called “Blue Screen” on your right-hand side and then click the “Run the troubleshooter” button to run the Blue Screen Troubleshooter and then follow the next on-screen options. Note that you might have to boot your PC into Safe Mode.

Option 4 – Run the Windows Memory Diagnostic tool

You can use the Memory Diagnostic tool in Windows to check RAM. Before you use this tool, make sure you save all your important work.
  • Tap the Win + R keys to open the Run dialog box.
  • Next, type in “mdsched.exe” in the field and hit Enter to open Memory Diagnostic.
  • After that, the Windows Memory Diagnostic will give out two options such as:
  1. Restart now and check for problems (recommended)
  2. Check for problems the next time I start my computer
  • Select any of the given options. After that, your computer will restart and check for memory-based issues upon the restart. If there are any issues, it will automatically them.

Option 5 – Disable Memory caching in the BIOS

You can also disable memory caching in the BIOS to fix the UNEXPECTED KERNEL MODE TRAP error.
  • Open the BIOS Setup screen.
  • Next, go to Advanced > Cache Memory and then disable it.
  • Tap the F10 key to save the changes made and restart your computer.

Option 6 – Run System File Checker

  • Tap Win + R to launch Run.
  • Type in cmd in the field and tap Enter.
  • After opening Command Prompt, type in sfc /scannow
  • Restart your computer once the scan is completed.

Option 7 – Clean your hardware components for dust

Cleaning your computer’s hardware components for dust might also help in resolving the UNEXPECTED KERNEL MODE TRAP error. Make sure to use a soft cloth in cleaning the hardware as well as a small blower. Moreover, ensure that you do not damage any parts with moisture or cause harm to any circuits while you’re at it.
Read More
Error Code 0x6d9 - The Causes & The Fix!

What is the Error Code 0x6d9?

If you have a firewall installed on your system, you may come across the error code 0x6d9.  This error occurs when opening Windows Firewall with advanced security. The error code 0x9d9 is displayed as:

“There was an error opening the Windows Firewall with Advanced Security snap-in. The Windows Firewall with Advanced Security snap-in failed to load. Restart the Windows Firewall service on the computer you are managing. Error code: 0x6D9”

This occurs when the Windows Firewall service is missing. The service doesn’t start due to permission errors on various registry keys. It is a critical blue screen of death error code that turns the computer screen blue and causes the Windows to shut down. If this error code is not fixed it may start appearing more and more frequently resulting in total system corruption.

Solution

Restoro box imageError Causes

Virtually, the underlying cause for Windows Firewall error code 0x6d9 is a damaged registry. The registry is the database of the system that saves all the activities including web browsing and programs installed and uninstalled and junk files on the PC. The registry saves all the information in the RAM, your hard disk. As the disk gets filled with files, it then requires more power to run which impacts the performance of the PC and slows it down. Simultaneously, since the hard disk is overloaded with data, it exposes the registry to file damages, fragmentation, and corruption which then eventually causes hindrance in running calling programs and running them on your system because files are either corrupt or missing. Other than cluttered disk issues, registry errors also occur due to viral and malware attacks. If the Firewall is inaccessible, your system is prone to malware.

Further Information and Manual Repair

To fix the error code 0x6d9 on your system, you don’t have to be a computer programmer or hire a professional. You can fix it all by yourself with Restoro. Restoro is an advanced, intuitive, user-friendly, and multi-functional repair tool with a comprehensive suite of powerful PC fixing utilities, all in one. From registry errors like the blue screen of death error codes including 0x6d9 to viral infection and system slowdowns, Restoro is your one-stop solution for all PC errors. With this software, you don’t need any technical expertise. You don’t have to get into the nitty-gritty of finding the deep-rooted cause for the error code 0x6d9 and then searching and installing a PC tool designed to solve that specific cause for the error. Restoro has an intuitive and sophisticated interface combined with an automated algorithm that enables it to detect, scan and identify all the underlying and deep-rooted causes for errors on your PC in seconds and resolves them all. All you have to do is hit the scan button and the Restoro takes care of the rest.

Restoro features

Restoro is also easy to use and has simple navigation making it easy for all levels of users including beginners and intermediates to use. This PC Fixer is both a high-functional registry cleaner and a powerful anti-virus. This means whether the error code 0x6d9 occurs due to disk overload or viral infection this helper can be used to fix the error in both scenarios. Its in-built registry cleaner cleans and clears up the hard disk in a few seconds. It removes all the unnecessary and obsolete files cluttering the system and repairs the damaged registry. For data safety during repair, it has a built-in back feature. This feature allows you to save and create backup copies of all your files. Its smart privacy error detector feature checks for viruses, spyware, adware, and malware invasion on your system. Such malicious software if not removed from your PC can expose you to data security risks.  Such software allows easy access to hackers. And since error code 0x6d9 hampers you in using Firewall, your system will have higher chances of getting infected by viruses and data security dangers. Nonetheless, by running Restoro on your system, you can easily remove this malicious software and resolve the error code 0x6d9. Unlike other repair tools, Restoro is compatible with all Windows versions.

How to get Restoro

So, what are you waiting for? It will take just 3 steps. To get started all you need to do is:
  1. Click here to install Restoro
  2. Run it to Scan for errors
  3. Hit the repair button to resolve
To prevent the error code 0x6d9 from reoccurring on your PC for a while proper PC maintenance is advisable to run Restoro on a weekly basis on your system so that the registry is not cluttered and your system is not exposed to viruses. Timely detection of errors and repair is the best way to keep your system performing smoothly and at its optimum speed.
Read More
1 2 3 171
Logo
Copyright © 2023, ErrorTools. All Rights Reserved
Trademark: Microsoft Windows logos are registered trademarks of Microsoft. Disclaimer: ErrorTools.com is not affiliated with Microsoft, nor claims direct affiliation.
The information on this page is provided for information purposes only.
DMCA.com Protection Status