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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.

10 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.

Dynamic Wallpapers introduced with Mojave Update in macOS are pretty cool. Dynamic Desktop is a feature introduced in macOS Mojave (10.14), in which the desktop background changes according to the time of Mac's current location. If Location Services are turned off the Privacy pane of the System Preferences, then the time zone specified in the Date & Time preferences will be used. To apply macOS Dynamic Wallpaper on Windows 10 we need to download & use WinDynamicDesktop, a free application that lets you apply macOS Dynamic Wallpaper. After the installation, you will be asked to Configure the Schedule. While doing that you need to make sure that you enter your location correctly. You can even set specific sunrise and sunset timing by selecting “Use specific sunrise and sunset times” and changing the Sunrise and Sunset times manually. Now, you will be greeted with some of the coolest dynamic wallpapers in the market. Select a theme of your choice, click on the Download button (file size can range between 20-200 MB), and click Apply to enjoy macOS Dynamic Wallpaper on Windows 10. If for some reason you want to go back to the default Windows theme but not necessarily delete the application then right-click on the WinDynamicWallpaper icon from the taskbar, click Select Theme, select None (from the theme section) and click Apply.

You might be familiar with the Encryption File System or EFS algorithm if you rather keep your files and folders encrypted. Encryption File System is a built-in feature in Windows 10 which allows users to secure their important files. Although there is an alternative way for you to secure your data on your Windows 10 computer, you can’t ignore the fact that the main advantage of an Encryption File System over BitLocker is that the former can help you encrypt a particular folder rather than encrypting the whole hard drive partition. If you move a file inside a folder encrypted with the Encrypting File System it will automatically get encrypted. There are some users who like this feature but unsurprisingly, there are some that don’t. So if whether you want your files encrypted when you place them in an encrypted folder or if you want to keep it as it is, read on as to how you can do it either way. You can enable or disable automatic encryption of files moved to encrypted folders in Windows 10 using the Registry Editor or the Group Policy Editor. Before you proceed, make sure to create a System Restore Point first because the modifications you’re about to make in your computer might affect its overall functioning so if anything goes wrong, you can always undo the changes. Once you have that covered, refer to the options given below to enable or disable automatic encryption in Windows 10.

Option 1 – Enable or disable automatic encryption using Registry Editor

• Press the Win key + R key at the same time to open the Run dialog box.
• Then type “Regedit” in the field and press Enter to open the Registry Editor and if a User Account Control or UAC prompt appears, just click Yes to proceed.
• After opening the Registry Editor, navigate to this key location: HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionPoliciesExplorer
• Next, right-click on Explorer and select New > DWORD (32-bit) Value and then name the newly create DWORD to “NoEncryptOnMove” and press Enter to save it.
• After that, double click on the NoEncryptOnMove DWORD and set its value to the following preferences:
  • 1 – Disable Auto Encryption of files moved to encrypted folders.
  • 0 – Enable Auto Encryption of files moved to encrypted folders.

• Now close the Registry Editor and restart your computer to successfully apply the changes made.

Option 2 – Enable or disable automatic encryption using the Group Policy Editor

• Press the Win + R keys to open the Run box and type “gpedit.msc” in the field and press Enter to open the Group Policy Editor.
• After that, navigate to this path: Computer ConfigurationAdministrative TemplatesSystem
• Next, look for the “Do not automatically encrypt files moved to encrypted folders” option and double click on it to set the policy. From there, you will see the following description:

“This policy setting prevents File Explorer from encrypting files that are moved to an encrypted folder. If you enable this policy setting, File Explorer will not automatically encrypt files that are moved to an encrypted folder. If you disable or do not configure this policy setting, File Explorer automatically encrypts files that are moved to an encrypted folder. This setting applies only to files moved within a volume. When files are moved to other volumes, or if you create a new file in an encrypted folder, File Explorer encrypts those files automatically.”

• Now select one of the radio buttons below depending on your preference:
  • Not Configured or Disabled: Enable Auto Encrypt of files moved to EFS Encrypted folders.
  • Enabled: Disable Auto Encrypt of files moved to EFS Encrypted folders.
• Then click on the Apply and OK buttons to save the changes made.
• Exit the Group Policy Editor and restart your computer.

The TWCU.EXE or TP-LINK Wireless Client Utility is a configuration application required to run wireless adapters successfully. The TP-LINK Wireless Client Utility application only exists on computers that are using the TP-LINK adapters. Upon the installation of this application, the service will be automatically added to the Windows service list that will continuously run in the background. The Twcu.exe is placed at the C:\Program Files\TP-LINKTP-LINK\Wireless Utility folder and is used by TP-LINK to connect to the internet. The name of the main executable file is twcu.exe and can be viewed in the Services tab of the Task Manager. If you are one of the users who just upgraded to Windows 10 from the previous Windows versions, then you’ll most likely see an error saying, “Failed to load the library file!” that has something to do with twcu.exe or TWCU. This error pops up when you go to your desktop and every time you log into your Windows 10 PC. Like pointed out, this error is related to the TP-LINK Wireless Client Utility and every user who is using the TP-LINK Wireless Client Utility is experiencing this problem which may be due to some compatibility issues especially when you start getting this error right after you upgraded to Windows 10. To fix this problem, follow each one of the options given below.

Option 1 – Try running in Compatibility Mode

The best thing you can do is to run the TP-LINK Wireless Client Utility in the compatibility mode since the problem is due to some compatibility issue. To run this utility in the compatibility mode, here’s what you have to do:

• Look for the TP-LINK Wireless Client Utility which should be located on your desktop.
• Once you find it, right-click on it and select Properties from the context menu.
• After that, go to the Compatibility tab and mark the checkbox for “Run this program in compatibility mode for:” and from the drop-down list, select either Windows 7 or Windows 8.
• Click the Apply button and then click OK to save the changes made and check if it has resolved the issue or not.

Option 2 – Try troubleshooting compatibility

This option is almost the same as the first one except it is an alternative way of fixing the TP-LINK Wireless Client Utility in case the first one didn’t work. In this option, you will troubleshoot the compatibility issue of the TP-LINK Wireless Client Utility.

• Look for the TP-LINK Wireless Client Utility which as mentioned, is on your desktop.
• Then right-click on it and select the “Troubleshoot compatibility” from the context menu.
• After that, click on the “Try recommended setting” option. Once the process is done, the error message should be gone.

iLivid is a video download manager for YouTube and other third-party video-hosted websites. iLivid download manager has powerful features that make it the fastest and easiest way to download hosted files. iLivid includes XBMC plug-ins that let you play almost all popular audio and video formats, in any available protocol and in any media type: streaming, CDs, DVDs, and RAR and archived files from your hard drive.

Livid is a program developed by Bandoo Media Inc. Upon installation, it defines an auto-start registry entry which allows the program to run on each boot for the user who installed it. A scheduled task is added to Windows Task Scheduler in order to launch the program at various scheduled times. The software is designed to connect to the Internet and adds a Windows Firewall exception in order to do so without being interfered with.

Multiple Anti-Virus scanners have detected iLivid as a possible Malware and are therefore not recommended.

About Potentially Unwanted Applications

Have you ever discovered an unwanted program running on your computer system and wondered how the heck it got there? These unwanted programs, which are referred to as Potentially Unwanted Programs, or PUP briefly, typically tag along as a software package when downloading the program and could cause serious problems for computer users. The term PUP was actually coined to identify this downloadable crapware as something other than malicious software. The primary reason for this is the fact that the majority of PUPs get into users’ computers not because they exploit security weaknesses, for instance, but mainly because the users grant consent to install it – unwittingly in many instances. However, it is obvious that PUPs continue to be bad news for PC users as they could be really detrimental to your computer in numerous ways.

How does unwanted software affect you?

PUPs come in various forms; having said that, many are classified as adware, which always displays irritating ads and advertising banners on internet pages that you’re exploring. Additionally, they come in the form of web browser extension add-ons and toolbars. Not only they entirely fill up space on your computer screen, but toolbars could also manipulate search engine results, monitor your web browsing activities, decrease your web browser’s efficiency, and slow down your web connection to a crawl. PUPs load up a nasty bite if left unchecked. Some PUPs carry keyloggers, dialers, and other software to gather your personal details which might lead to identity theft. Often, such software will turn off security protections and settings to take control over your computer, making that computer susceptible to online hackers and data thieves. At a minimum, PUPs slow your PC down with every added program.

Preventing unwanted programs

• When installing anything on your desktop, always study the fine print, including the EULA. Don’t accept terms of use that are for bundled programs. • Choose the “custom” install whenever installing an application. In particular, focus on those tiny boxes that have been checked as default, where you may ‘agree’ to get advertisements or install software bundlers. • Use an advert blocker/pop-up blocker; Deploy anti-malware products such as Safebytes Anti-malware. These software programs will establish a wall between your computer and cybercriminals. • Avoid installing applications you don’t really need. Do not ever install software programs that appear suspicious or malicious. • Don’t download programs from popups, internet advertising, file sharing sites, and also other unreliable sources; be cautious about any preset, unwanted options when downloading software. Avoid going to weblogs and sites that promote pirated software.

Can't Install Safebytes Anti-malware because of a Virus? Do This!

Malware could potentially cause a lot of damage to your personal computer. Some malware is designed to interfere with or prevent things that you wish to do on your computer. It may not allow you to download anything from the net or it will stop you from accessing some or all of the internet sites, particularly the anti-virus websites. If you’re reading this article, chances are you’re stuck with a virus infection that is preventing you to download and/or install the Safebytes Anti-Malware program on your computer system. There are a few solutions you could try to get around with this issue.

Download the software in Safe Mode with Networking

If the malware is set to load automatically when Microsoft Windows starts, getting into Safe Mode may block the attempt. Since just the bare minimum programs and services launch in safe mode, there are hardly any reasons for conflicts to take place. Below are the steps you have to follow to boot into the Safe Mode of your Windows XP, Vista, or 7 computers (visit Microsoft site for directions on Windows 8 and 10 PCs). 1) After switching on the computer, hit the F8 key while the Windows splash screen begins to load. This should bring up the Advanced Boot Options menu. 2) Choose Safe Mode with Networking with arrow keys and press Enter. 3) Once this mode loads, you will have the internet. Now, make use of your web browser to download and install Safebytes Anti-malware. 4) Immediately after installation, run a full scan and allow the software program to get rid of the threats it finds.

Switch to an alternate browser

Web-based malware could be environment-specific, targeting a particular internet browser or attacking particular versions of the browser. If you seem to have malware attached to Internet Explorer, then switch to a different internet browser with built-in safety features, such as Chrome or Firefox, to download your preferred antivirus program – Safebytes.

Run anti-virus from your USB drive

Another option is to save and run an anti-malware software tool entirely from a Pen drive. Follow these steps to use a USB drive to fix your corrupted computer. 1) On a virus-free computer, install Safebytes Anti-Malware. 2) Put the USB drive into the uninfected computer. 3) Double-click the Setup icon of the anti-malware software package to run the Installation Wizard. 4) Select the drive letter of the flash drive as the place when the wizard asks you where you want to install the antivirus. Follow the on-screen instructions to complete the installation process. 5) Unplug the USB drive. Now you can use this portable anti-malware on the infected computer system. 6) Double-click the antivirus program EXE file on the pen drive. 7) Run Full System Scan to identify and clean-up up all kinds of malware.

Let's Talk About SafeBytes Security Suite!

If you’re looking to download an anti-malware application for your computer, there are various tools in the market to consider nonetheless, you should not trust blindly anyone, no matter whether it is a free or paid program. Some of them are excellent, some are decent, while some will ruin your computer themselves! You have to select a company that creates industry-best anti-malware and has earned a reputation as reliable. Among few good programs, SafeBytes Anti-Malware is the highly recommended tool for the security-conscious individual. Safebytes is one of the well-established PC solutions companies, which offer this complete anti-malware application. This software program could easily identify, eliminate, and protect your PC from the most advanced malware attacks such as spyware, adware, trojan horses, ransomware, worms, PUPs, and other possibly damaging software applications. There are lots of amazing features you will get with this security product. Here are some popular features present in this software: Real-time Threat Response: SafeBytes gives complete and real-time security for your personal machine. It will check your personal computer for suspicious activity at all times and safeguards your personal computer from unauthorized access. Anti-Malware Protection: This deep-cleaning anti-malware application goes much deeper than most anti-virus tools to clean your computer. Its critically acclaimed virus engine detects and disables hard-to-remove malware that conceals deep inside your PC. Web Security: Through its unique safety score, SafeBytes informs you whether a site is safe or not to access it. This will make sure that you’re always certain of your online safety when browsing the net. High-Speed Malware Scanning Engine: Safebytes Anti-Malware, with its advanced scanning engine, offers super-fast scanning that can promptly target any active online threat. Lowest CPU/Memory Usage: SafeBytes gives you complete protection from online threats at a fraction of the CPU load due to its enhanced detection engine and algorithms. 24/7 Online Technical Support: You will get 24/7 technical support to quickly resolve any problem with your security application.

Technical Details and Manual Removal (Advanced Users)

If you wish to manually get rid of iLivid without using an automated tool, it may be possible to do so by deleting the program from the Windows Add/Remove Programs menu, or in cases of browser extensions, going to the browser’s AddOn/Extension manager and uninstalling it. It is also recommended to factory reset your browser to its default condition to fix corrupt settings. If you decide to manually remove the system files and registry entries, utilize the following list to ensure that you know exactly what files to remove before executing any actions. However, editing the registry is really a complicated job that only advanced computer users and professionals should try to fix the problem. Moreover, certain malicious programs are capable to defend against its deletion. It is recommended that you do the removal process in Windows Safe Mode.

Cache files are temporary files that have been created by various applications and services when used.  As temporary files, they are safe to be removed and deleted from the system since the application or service will create new ones when needed but sadly will not remove old ones, this task is left to OS itself. Automatic Windows cleanups can mostly take care of these things but for top-notch performance clearing cache manually is a far better option. We will here explore various cache temporary files, where they are, and how to clean them. Sit back and let’s do some cleaning!

Clear cache using Disk Cleanup

1. Open Start menu and search Disk Cleanup
2. Click on it in search results
3. Click on the drives drop-down menu and select the drive where is Windows 11 installed
4. In the Files to Delete section enable all boxes and click on OK
5. Click on delete Files to confirm

Clear Microsoft store cache

1. Press ⊞ WINDOWS + R to open the run dialog
2. Type in WSReset.exe and press ENTER
3. Black blank windows will appear, wait for the window to close itself and you are done

Clearing location cache

1. Press ⊞ WINDOWS + I to open location history
2. Select Privacy & Security
3. In the App Permissions section click on Location
4. On-Location page click on Clear

Clear and flush DNS

1. Press Start and search for Windows Terminal
2. Click on Terminal in search results
3. Type in: ipconfig /flushdns and press ENTER

And that is that!

Windows 11 brought with it a simplified right-click menu that has limited options. If you would like to bring the old Windows 10 right-click menu you will have to do some registry tweaking but it is doable. Since this requires registry tweak, please follow given solution step by step

1. Press Start and type RegEdit
2. Click on Registry Editor
3. Inside registry editor find next key: Computer\H_KEY_CURRENT_USER\SOFTWARE\CLASSES\CLSID\
4. Right click in the right part of editor window and select New > Key
5. Type in as a name: {86ca1aa0-34aa-4e8b-a509-50c905bae2a2}
6. Right click on {86ca1aa0-34aa-4e8b-a509-50c905bae2a2} key and select New > Key again to create new key inside this one
7. Name inside key InprocServer32
8. Double click the “(Default)” key in InprocServer32 to open it
9. When the Default key opens close it without making any changes by clicking on OK. This will make its value property Blank instead of value not set
10. Close Registry Editor
11. Restart your PC

Once the system is up if the followed solution is applied you will now have an old school menu once right-click is used.

In case you don’t know, Microsoft Office uses a separate mechanism than the Windows operating system for specific purposes such as Updates and Activation which brings in the content dependencies of this mechanism on different services and processes. Thus, in such cases, you could encounter errors like the error code 0x80070426. When you get this error, you will see the following error message on your screen:

“An unexpected error has occurred. Your request cannot be processed at this time. Please try again later. (0x80070426)”

This kind of error is caused by various supporting processes and services that are not working or are not being triggered as they were supposed to. If you are currently facing this issue, worry not for this post will guide you in fixing it. There are two potential fixes you can try – you can either check the responsible services or manually run the Activation Script. For more details refer to the given options below.

Option 1 – Try checking the responsible Services

• In the Start search, type “services.msc” in the field and tap Enter or click OK to open the Windows Services Manager.
• If a User Account Control or UAC prompt appears, just click on Yes to proceed to the Windows Services Manager utility window.
• After that, look for the “Software Licensing Service” service entry from the given list of services inside the window.
• Then right-click on it and select Properties and from there, make sure that its Startup Type is set to Automatic.
• Once done, click on the Start button to start the service and then exit the Services Manager.
• Next, tap the Win + R keys to open the Run utility and then type “cmd” in the field and tap Enter to open an elevated Command Prompt.
• After that, type and enter each command below one after the other.
  • net start slsvc
  • sc qc slsvc
  • sc queryex slsvc
  • sc qprivs slsvc
  • sc qsidtype slsvc
  • sc sdshow slsvc
• Now check if the problem is fixed or not.

Option 2 – Try to manually run the Activation Script

• In the Start search, type “cmd” and right-click on Command Prompt from the given search results and then select the “Run as administrator” option to open Command Prompt with admin privileges.
• Next, navigate to the following location inside the Command Prompt command-line utility if you are using Office 16.
  • x86: C:/Program Files (x86)/Microsoft Office/Office16
  • x64: C:/Program Files/Microsoft Office/Office16

• On the other hand, if you are using an older version, go to the following location instead.
  • x86: C:/Program Files (x86)/Microsoft Office/OfficeXX
  • x64: C:/Program Files/Microsoft Office/OfficeXX
• Once you’re in the location, type the following command to run the Activation Script and then tap Enter.

cscript ospp.vbs/act

• The command you just entered will activate your copy of Microsoft Office.

The issue with the abrupt system reboots to force Windows 10 updates on a computer has been lessened with Active Hours. This feature keeps a record of the hours during which a system remains active and prevents the installation of updates during such hours. For example, when a system restart is needed to complete the installation of an update, Active Hours delays the update and allows you to finish what you’re doing on your computer. Thus, if you haven’t heard of this feature, then now is the time you do, read this post to configure and use Active Hours in your Windows 10 computer. There are three ways you can configure Active Hours. The first one is for general users, whereas the rest of the two methods are for users who knows their way about the Windows Registry and Group Policy. To get started, refer to every given option below.

Option 1 – Configure Active Hours via Windows 10 Settings

• Go to Settings > Update & Security. From there, click on the “Change active hours” option under the Windows Update section.
• Next, you can select a time (“Start time” and “End time”) during which the restart can occur.
• After that, click on the Save button and exit.

Note: Keep in mind that the values you’ve entered indicate the hours during which your system is in use, namely, ACTIVE. It is important for your active hour’s interval period and it can be anything between 1 and 18 hours since you can’t go beyond 18 hours. In addition, there is no option to configure different active hours on different days and you can’t specify different active hours for weekends and weekdays as well. On the other hand, Windows 10 also offer users an option to override Active Hours. All you have to do is go to Settings > Update & Security > Windows Update > Restart Options. From there, you can choose a custom restart time when your computer will restart to install the updates but this is only a one-time setting.

Option 2 – Configure Active Hours via Registry Editor

• Tap the Win + R keys to open the Run utility and type “Regedit” in the field and tap Enter or click OK to open the Registry Editor.
• Next, navigate to this registry path: HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsUpdateUXSettings
• In the given registry path, you can choose to change “ActiveHoursStart” and “ActiveHoursEnd”.

Note: There are no extra settings available in the Registry Editor but you can change the remote computer’s Active hours settings using the Registry Editor.

Option 3 – Configure Active Hours via Group Policy

Note that this option is available for the Windows 10 Pro and Educational or Enterprise versions. It is mostly used by computers in Business or through remote access. To get started, follow these steps:

• Tap the Win + R keys to launch Run and type “gpedit.msc” in the field and tap Enter or click OK to open the Group Policy Editor.
• Next, navigate to this group policy setting: Local Computer Policy > Computer Configuration > Administrative Templates > Windows Components > Windows Updates.
• From there, look for a policy labeled “Turn off auto-restart for updates during active hours” and double click on it. This will open a new window.
• Click on the Enabled radio button to enable Active Hours. You also have the option to choose active hours just like in the first given option above. It works just fine except when the following policies don’t override:
  • No Auto-restart with logged-on users for scheduled automatic updates installations.
  • Always automatically restart at the scheduled time.

• Since Group Policy allows you to reduce the range of active hours, you can configure it if you want it to be less than 18 hours. Just find the policy setting labeled “Specify Active hours range for auto -restarts. The minimum is 8 hours”.
• After you set the Active Hours, click the Apply and OK buttons to save the changes made.

If you receive an error message that says, “Entry point not found, The procedure entry point could not be located in the dynamic link library” on your Windows 10 PC, then you will find this post useful for this will provide you some potential fixes to fix the error. This kind of error can occur if a program fails to locate the DLL library that it needs in order to run. It can also occur if the library is not in the specified directory in the path or if the DLL file has gone missing or has become corrupted. To fix the “The procedure entry point could not be located in the dynamic link library” error, check out the following options given below.

Option 1 – Try to reinstall the program

The first thing you can do to resolve the error is to uninstall the program that throws the error and download its latest version from its official site and then install it again.

Option 2 – Run System File Checker scan

If reinstalling the program didn’t work, you can also try running the System File Checker or SFC scan to fix the error. System File Checker is a command utility built into your computer that helps restore corrupted files and missing files. Refer to the following steps to run it:

• Hit the Win + R keys to launch Run.
• Type in cmd in the field and tap Enter.
• After opening Command Prompt, type in sfc /scannow

The command will start a system scan which will take a few whiles before it finishes. Once it’s done, you could get the following results:

1. Windows Resource Protection did not find any integrity violations.
2. Windows Resource Protection found corrupt files and successfully repaired them.
3. Windows Resource Protection found corrupt files but was unable to fix some of them.

 Reboot your computer.

Option 3 – Try checking the details in the Event Viewer

The Event Viewer can also help you resolve the error as it contains detailed information about the error that could help you pinpoint its root cause and resolve it.

Option 4 – Try to re-register the problematic DLL file

You may have to re-register the ntdll.dll file using the regsvr32.exe before you can successfully install the program and fix the error. The Regsvr32 tool is a command-line utility that can be used to register and unregister OLE controls like DLL and ActiveX (OCX) controls in the Windows operating system. Follow the steps below to use it.

• Open Command Prompt as admin from the WinX menu.
• Next, type the following commands in the elevated Command Prompt and hit Enter to execute the command. This will re-register the affected DLL file using the Windows operating system tool, regsvr32.exe.
  • exe /[DLL file]
  • exe [DLL file]

Note: Replace “[DLL file]” with the name of the DLL file that was pointed out in the error.

• After you execute the given commands, you should see a message saying, “DllRegisterServer in vbscript.dll succeeded” if the Regsvr32 tool was able to run successfully. After that, try to install the program again and see if it now works.

Option 5 – Try to replace the DLL file with a trusted source

• First, you need to get the new DLL file from another computer with preferably the same file version number.
• After that, you need to boot your PC into Safe Mode and navigate to the paths listed below and then replace the file using a USB drive or other external storage devices.
  • x86: This PC > C:/Windows/System32
  • x64: This PC > C:/Windows/SysWOW64
• Next, type “cmd” in the Cortana search box and right click on Command Prompt, and select “Run as administrator” to open it with administrator privileges.
• Now type the “regsvr32 ntdll.dll” command and hit Enter.
• Restart your PC and check if the error is now fixed.

Option 6– Try to scan your computer using Windows Defender

It is also possible that the DLL file might be infected with malware or virus which could explain why you’re getting the error. Thus, you have to scan your computer using security programs like Windows Defender.

• Tap the Win + I keys to open Update & Security.
• Then click on the Windows Security option and open Windows Defender Security Center.
• Next, click on Virus & threat protection > Run a new advanced scan.
• Now make sure that Full Scan is selected from the menu and then click the Scan Now button to get started.