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• There are corrupted, outdated, or incorrectly configured device drivers.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

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How to Fix Error Code 0x80070057
The Error Code 0x80070057 is rather typical with Win7. Customers of Win7 maintain reporting that each moment they strive to install this Operating system, it shows this problem error. Often, the total information that comes with this specific error is:
"Error Code 0x80070057: The parameter is wrong"
When this problem happens, you will end up struggling to move private documents from one person to another.

Solution

Restoro box imageError Causes

You could get the error message when you attempt installing Win7,
"An Internal Error has occurred. Incorrect parameters".
If this happens to you, realize that you are dealing with malfunction code 0x80070057. This error occurs mostly when you are trying to build a full backup of your Windows 7 OS.

The primary source of Error 0x80070057 is huge registry values.

Extensive registry values usually occur when you are trying to back up your Windows 7 OS. This means that you need to immediately create a bigger virtual memory space to avert the occurrence of the error.

Error Code 0x80070057 can be a result of incompatibility between the motherboard and some drivers.

Check whether the computer's motherboard and the installed drivers are compatible. If you can't do this effectively on your own, it might be a good idea to enlist the services of a qualified technician.

The Problem Signal 0x80070057 has a close Connection with RAID Installations

RAID installations have a tendency of sparking off the Error Code 0x80070057. If you experience this error while using RAID, first turn off the RAID setup and check whether that resolves the problem.

Further Information and Manual Repair

Error Code 0x80070057 is repairable. Thus, there's absolutely no cause for alarm when you see it with respect to your own Windows 7 Operating System. So what can you do to resolve it? a) Increase Virtual Memory: This is perhaps the most common solution to Error Code 0x80070057. In most cases, simply raising the virtual memory especially on Windows 7 Operating-System completely eliminates the error. Moreover, you don't have to be technically advanced to effect the change. Simply follow these steps:-
  • Click the Start Button and visit Control Panel
  • Click System Security, and proceed to System.
  • Click the Advanced System Settings, subsequently proceed to the Advanced Level Tab.
  • Click Change, which can be under the Virtual Memory
  • Change the virtual memory value. For instance, you can customize entirely from 2000MB to 6000MB.
  • Click Set, then Ok. You are done
As with each additional change you make with respect to your Computer, you will have to conclude by re-booting it. This way you make certain that they'll stay as you've established them and apply the necessary modifications. If the error still persists after attempting the preceding fix, download a registry-cleaning software. The software will clean up your disk and free up memory thus increasing the available virtual memory for your computer. This should solve your persistent Error Code 0x80070057.
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What to do if CPU is not running at full speed
The speed at which the CPU runs varies depending on any Windows laptop or desktop. And in case you don’t know, the CPU does not run at full speed all the time as it depends on how the operating system distributes the load so it works accordingly. However, there are instances when it runs at full speed especially if your Windows 10 computer is on a heavy workload. But if you find that even when your computer is already on a heavy workload and the CPU is still not running at full speed, then you need to look into this situation. To verify that your CPU’s speed, you can use any CPU stress test tool. This kind of issue is common on laptops compared to desktop computers since laptop runs on battery. The Intel Processor on laptops uses the Speed Stepping Technology which means that when you are doing some small tasks on your laptop, the processor’s speed is reduced. On the other hand, if this happens when you are using a heavy application, it can be due to a low charge on the laptop’s battery. Thus, Windows will try its best to keep the computer running for as long as possible by reducing the CPU speed or processor. But there are times when you are ready to sacrifice battery to make sure that the work gets done on time. To achieve that, here are some options you can check out.

Option 1 – Try setting the processor state to the maximum in Power Options

  • Type “control” in the search box to view the classic Control Panel as well as the popular options.
  • Next, click on Power Options > Change plan settings > Change advanced power settings.
  • Then navigate to Processor power management > Maximum processor state.
  • Now select 100% when it is on Battery and Plugged in.
  • After that, expand the System cooling policy option and make sure to set it as Active to make sure that the battery won’t overheat.
  • Finally, apply the changes made to all the profiles of the power management and restart your computer. This will ensure that your CPU will run at maximum power at all times.

Option 2 – Try to update or disable the Intel Power Management driver

The next option you can try is to update or disable the Intel Power Management driver. The Intel-powered computers have dedicated software that controls CPU speed and Fan speed when it needs to save battery. You can try disabling it temporarily and check if there are any changes with the CPU fan speed.
  • First, restart your computer by holding the Shift key to boot your computer into Troubleshooting or Advanced mode.
  • Next, go to Troubleshoot > Advanced Options > Command Prompt.
  • Then change the directory to C:/Windows/System32/driver and then rename the file named “Intelppm” by entering the “ren intelppm.sys intelppm.sys.bak”.
  • Now restart your computer.
Note: If you were not able to find the drivers in C:/Windows/System32/driver, check if they are available under C:/Drivers/IntelPPM. After that, the CPU speed should change now with the Intel driver missing from the system. And in case you want to enable it, simply follow the same steps given above and rename the file again.

Option 3 – Try disabling the IPPM using the Command Line or Registry Editor

  • Command Prompt:
    • Tap the Win + R keys to open the Run dialog box and type “cmd” and tap Enter to open Command Prompt.
    • Next, type this command and hit Enter: sc config intelppm start= disabled
    • The “sc config” command you entered modifies the value of a service’s entries in the registry as well as in the Service Control Manager database.
  • Registry Editor:
    • Tap the Win + R keys to open the Run dialog box and type “Regedit” in the field and hit Enter to open the Registry Editor.
    • Next, navigate to HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesintelppm.
    • From there, double click on the intelppm and change the Start key value to
    • Now close the Registry Editor and reboot your computer.
Note: The steps given will make sure that the CPU will run at maximum power at all times.
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Remove the blue and yellow shield icon
If you suddenly see a system icon or an application icon that has a blue and yellow shield or icon overlay at the corner, this indicates that the application has to run with admin privileges and each time you run these kinds of applications, a UAC or User Account Control prompt will appear to confirm if you really want to run the application. Although this kind of behavior is for security reasons, it can get quite annoying especially if you use the application on a daily basis. To make it convenient for you, this post will walk you through how you can remove the blue and yellow shield icon from an application on your Windows 10 computer. The User Account Control or UAC setting is the one that ensures no program can run with administrative privileges unless it is allowed by the user. This stops any program that could be potentially harmful to the computer from making any changes which are why keeping this setting to its default state is for the best and making any changes in its setting is not recommended unless it is really needed. So if you really have to remove the icon overlay in an application, there are several ways you can do that. You can try reinstalling the program and set Compatibility or change the UAC level. For more information, refer to every option given below.

Option 1 – Try to reinstall the application and set Compatibility

As you know, the application icons where you can see the shields are shortcuts mostly and they signify that the User Account Control will appear each time you launch the app. Thus, if you have an app that you use regularly and you’re certain that the app can be trusted, you can try to reinstall the app and set its compatibility by following these steps:
  • You need to uninstall the app first and then install its latest version. You must not run or open the app after you reinstall it, not until you’ve completed the steps.
  • Next, you have to right-click on the shortcut icon of the app, and from the menu, select Properties.
  • Afterward, go to the Compatibility tab and look for the checkbox labeled “Run this program as an administrator” and uncheck it.
  • Now click on the Apply and OK buttons to save the changes made. This should remove the shield icon from the app.

Option 2 – Try changing the UAC level

  • Tap the Win + Q to open the search bar and type UAC to see the User Account Control setting.
  • From the UAC setting, lower the UAC level by selecting the settings that say, “Notify only when apps try to make changes to my computer”.
  • After selecting that option, you shouldn’t be getting any warning now when you run the app with the shield icon. But keep in mind that this is not a temporary setting which can be risky especially if the app can’t be trusted.
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How to Fix Modem Error 633
Modem Error 633 error is a dial-up error that usually occurs when using a USB modem with a Windows computer. The Modem Error 633 error message is displayed as the following:

“Error 633: The Modem is already in use or not configured properly.”

Solution

Restoro box imageError Causes

This error can be triggered due to several reasons such as:
  • A software program conflicts with the USB modem
  • The modem is not configured properly
  • The Telephon.ini file is missing or damaged
  • There is some issue with the way Windows is managing the communication (COM) ports on your computer.

Further Information and Manual Repair

If you experience the Modem Error 633 on your PC, you don’t have to panic. Though this error does not pose any major threats like data loss, it may hamper your ability to use the internet therefore it is advisable to resolve the error. Repairing the Modem Error 633 is quite easy. There are a number of ways to fix this error. So, let’s get started:

Solution 1: Delete Incompatible Software and Non-Present Modems

  • Click on the start menu and go to the ‘Control Panel’. Now choose the option ‘Phone and Modem’.
  • Here you will see three tabs, the dialing rules, modems, and advanced. Choose the tab ‘Modems’. As you click on it, you will see modems installed on your PC. To repair the Modem Error 633, select and remove all the incompatible software and modems that are not present and click ‘OK’.
  • Now to bring the changes into effect, restart your system with the modem plugged in and try connecting to the internet again.

Solution 2: Change the Communication Ports

If the error occurs because the modem is not properly configured, then this solution is possibly the best way to resolve this error. Here’s what you need to do:
  • Click on the Start menu and choose My Computer.
  • Now click on the option ‘Manage’ to open the Computer Management Window.
  • Once it opens, click the option ‘Device Manager and then expand the option modems. Click on Properties, then the Advanced tab, and the Advanced Port Settings button.
  • As you click on the Advanced Port Settings, then click on the COM Port Number drop-down box.
  • Choose a new Communication Port. However, make sure it is not already in use.
  • Once you make changes, click ‘OK’ and then restart your PC.
  • Now Open Device Manager again. Open the Modern Properties Window and then Click the Diagnostics tab.
  • After that view the command response window to verify if the error is fixed. If yes, then create a new dial-up connection and connect to the internet with ease.

Solution 3: Disable the Startup items

  • Another way to resolve Modem Error 633 on your PC is to go to the start menu and type ‘msconfig’ into the search box and then press ‘enter’.
  • Open the misconfig.exe program. As you open it, you will see 4 tabs, General, Boot, Service, Start-up, and Tools.
  • Now click on the ‘Start-up’, ‘Disable All’, and then press Apply.
  • After you press Apply, a window will pop up asking to restart the computer.
  • Confirm it and click restart.
  • Once the computer restarts now try connecting to the internet again. This will hopefully resolve the Modem Error 633.
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Troubleshooting Epic Games Launcher issues
If you are having trouble using the Epic Games Launcher, here are some troubleshooting steps that usually fix common problems.

Check the Epic Games server status

Check the Epic Games Server Status page to make sure all systems are operational. If the Epic Games Launcher is affected by an outage or system-wide issue, your issue may be fixed when the outage is resolved.

Clear your launcher’s webcache

Clearing the webcache often resolves display issues that may prevent you from using the launcher. Follow these steps to clear your webcache:

Windows

  1. Exit the Epic Games Launcher by right-clicking the system tray icon in the bottom-right corner, and then clicking Exit.
  2. Press Windows key + R, type “%localappdata%”, and then press Enter to open a File Explorer window.
  3. Open the Epic Games Launcher folder.
  4. Open the Saved folder.
  5. Click the webcache folder, and then delete it.
  6. Restart your computer, and then relaunch the Epic Games Launcher.

Mac

  1. Exit the Epic Games Launcher.
  2. Open Finder.
  3. Click on Go then Go to Folder...
  4. Type ~/Library/Caches/com.epicgames.EpicGamesLauncher and press Enter.
  5. Drag the webcache folder to the Trash.
  6. Press control and click on Trash.
  7. Click on Empty Trash.
  8. Relaunch the Epic Games Launcher.

Run the launcher as an administrator

Running the launcher as an administrator elevates its permissions so it can avoid problems with downloading games, for example. Follow these steps to run the launcher as an administrator:
  1. Right-click your Epic Games Launcher shortcut.
  2. Click Run as Administrator.

Update graphics card drivers

Making sure the player is using the latest graphics card drivers may resolve the launcher crashing. Review this article for steps on how to do update their graphics drivers.

Reinstall the Epic Games Launcher

Note: The following process will remove all of your installed games.

On Windows: 

Run system file checker then reinstall the Epic Games Launcher.
  1. Close the Epic Games launcher by right-clicking the system tray icon in the bottom right corner and then clicking Exit.
  2. Click Start.
  3. Type "cmd", right-click Command Prompt, and then click Run as administrator.
  4. In the window that opens, type "sfc /scannow", and then press Enter.  This may take a little while.
  5. Restart your computer.
  6. Click Start.
  7. Type "Add or Remove Programs", and then press Enter.
  8. Select Epic Games Launcher from the list of programs.
  9. Click Uninstall.
  10. Go to www.epicgames.com and click Get Epic Games in the top right corner to download the latest installer.

On Mac:

  1. Close the Epic Games Launcher.
  2. Verify there are no processes associated with the Epic Games Launcher by checking Activity Monitor.
  3. Open the Applications folder.
  4. Click and drag the Epic Games Launcher application to the Trash.
  5. Verify all the following directories no longer have any Epic Games Launcher folders or files:
    • ~/Library/Application Support
    • ~/Library/Caches
    • ~/Library/Preferences
    • ~/Library/Logs
    • ~/Library/Cookies
  6. Go to www.epicgames.com and click Get Epic Games in the top right corner to download the latest installer.

Launcher freezing on macOS 10.15.1 or earlier

If your launcher is freezing on macOS 10.15.1 or earlier, follow the steps above to reinstall the Epic Games Launcher on your Mac.

Verify system requirements

Make sure your computer meets the system requirements to run the Epic Games Launcher using this article here. The system requirements for the Epic Games Launcher are here.

Blinking Epic Games Launcher icon on the taskbar

If you can't start the Epic Games Launcher and see a blinking icon on your taskbar, use these steps to try and fix this:
  1. Right-click your Epic Games Launcher shortcut.
  2. Click Properties.
  3. Select Normal Window from the drop-down menu next to Run.
  4. Click the Compatibility tab.
  5. Uncheck any boxes, and then click Apply then OK.
  6. Click Start, then type "Graphics Settings" and press Enter.
  7. Select Classic app from the drop-down under Graphics performance preference.
  8. Click Browse.
  9. Navigate to the Epic Games Launcher installation directory. By default, this is C:/Program Files (x86)/Epic Games/Launcher/Portal/Binaries/Win64.
  10. Click the EpicGamesLauncher.exe file, and then click Add.
  11. Click Options.
  12. Select Power Saving.
  13. Click Save.
  14. Relaunch the Epic Games Launcher.
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Fix UTCSVC high CPU and Disk usage in Windows
There is a lot of high resource utilization by any process that slows down a Windows operating system and one of the services that could cause such a thing is the utcsvc.exe process. This particular process at times can cause high CPU and disk usage. So if you are currently facing this problem, read on as this post will guide you on how you can resolve the problem. UTC which stands for Universal Telemetry Client is a software that runs a service named Diagnostic Tracking Service or DiagTrak. This service is used by Microsoft to collect customer feedback, analyze customer’s problems, and push resolution via updates in order to make the Windows 10 operating system better. This service is an executable file that could be translated to Service Host and even though the process does not usually cause problems, there are actually times when it does especially if it results in high resource utilization. In such cases, you might want to consider disabling it to fix its high CPU and disk usage.

According to Microsoft:

“We collect information about you, your devices, applications and networks, and your use of those devices, applications, and networks. Examples of data we collect include your name, email address, preferences, and interests; browsing, search and file history; phone call and SMS data; device configuration and sensor data; and application usage.”
There are several ways you can disable the utcsvc.exe process. You can disable it using the Service Manager, Registry Editor, and Group Policy Editor. For more details, refer to the instructions laid out below.

Option 1 – Disable the Connected User Experience & Telemetry Service via Service Manager

Note that this option is for standalone systems, so if you’re not using one, refer to the next given options below.
  • Tap the Win + R keys to open the Run dialog box.
  • Then type “services.msc” in the field and tap Enter or click OK to open the Services Manager.
  • From the given list of services, look for the Connected User Experience service. Once you found it, click on it and you’ll see its description which states:
“The Connected User Experiences and Telemetry service enables features that support in-application and connected user experiences. Additionally, this service manages the event-driven collection and transmission of diagnostic and usage information (used to improve the experience and quality of the Windows Platform) when the diagnostics and usage privacy option settings are enabled under Feedback and Diagnostics.”
  • Next, right-click on it and select Properties.
  • Now, change its Startup Type to Disabled and click on the Apply and OK buttons to save the changes made.

Option 2 – Disable the Connected User Experience & Telemetry Service via Registry Editor

  • Tap the Win + R keys to launch the Run utility and type “Regedit” in the field and click OK to open the Registry Editor.
  • Next, navigate to this registry path: HKEY_LOCAL_MACHINESOFTWAREPoliciesMicrosoftWindowsDataCollection
  • After that, right-click on the folder named “DataCollection” and select New > DWORD (32-bit) Value.
  • Now name the new value “AllowTelemetry” and make sure that its Value data is “0” and then click on OK to save the changes made.
  • Restart your computer.

Option 3 – Disable the Connected User Experience & Telemetry Service via Group Policy Editor

If you have to disable the service related to the Universal Telemetry Client for company-managed systems, then you can do that using the Group Policy Editor.
  • Tap the Win + R keys to open the Run utility and type “gpedit.msc” in the field and hit Enter to open the Group Policy Editor.
  • Next, navigate to this path: Computer Configuration > Administrative Templates > Windows Components> Data Collection and Preview Build
  • After that, double-click on Data Collection and Preview Build to open its settings.
  • From there, look for the “Allow Telemetry” item and double click on it to open its Properties.
  • Next, set the radio button to Disabled and then click on the Apply button to save the changes made.
  • Restart your computer.

Option 4 – Run the Hardware and Devices Troubleshooter or the Performance Troubleshooter

Hardware and Devices Troubleshooter:

  • The first thing you need to do is click on Start and then on the gear-like icon to pull up the window for Settings.
  • After opening Settings, look for the Update and Security option and select it.
  • From there, go to the Troubleshoot option located on the left-hand side of the list.
  • Next, select Hardware and Devices from the list and open the Troubleshooter and run it. Once it is doing its job, wait for it to complete the process and then restart the system.
  • After the system restarts, check if the problem’s now fixed. If not, refer to the next option given below.

Performance Troubleshooter:

  • Tap the Win + R keys to open the Run dialog box.
  • Type “exe /id PerformanceDiagnostic” in the field and hit Enter to open the Performance troubleshooter.
  • Then click on Next to get started. Wait until the process is completed.
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10 Worst Computer Viruses in history
Computers viruses, worms, ransomware, etc. are kinds of malicious software that no user should take lightly. On several occasions, we have touched upon security steps that each user should take in order to protect its identity and data. Sadly sometimes even when all precautions are taken some malware can still slip through and wreak havoc. Today we are looking at some of the worst or the best, depending on your view that has indeed wreaked plenty of havoc.

viruses10 worst computer viruses in history

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

1. Mydoom – $38 billion

The worst computer virus outbreak in history, Mydoom caused estimated damage of $38 billion in 2004, but its inflation-adjusted cost is actually $52.2 billion. Also known as Novarg, this malware is technically a “worm,” spread by mass emailing. At one point, the Mydoom virus was responsible for 25% of all emails sent. Mydoom scraped addresses from infected machines, then sent copies of itself to those addresses. It also roped those infected machines into a web of computers called a botnet that performed distributed denial of service (DDoS) attacks. These attacks were intended to shut down a target website or server. Mydoom is still around today, generating 1% of all phishing emails. That’s no small feat considering the 3.4 billion phishing emails sent each day. By that figure, Mydoom has taken on a life of its own, infecting enough poorly-protected machines to send 1.2 billion copies of itself per year, 16 years after its creation. Though a $250,000 reward was offered, the developer of this dangerous computer worm was never caught. Wondering what makes the world’s most secure computers so safe? See the Tech@Work guide: Upgrade to the World's Most Secure and Manageable PC

2. Sobig – $30 billion

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

3. Klez – $19.8 billion

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

4. ILOVEYOU – $15 billion

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

5. WannaCry – $4 billion

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

Ransomware strikes again

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

6. Zeus – $3 billion

The Zeus computer virus is an online theft tool that hit the web in 2007. A whitepaper by Unisys three years later estimated that it was behind 44% of all banking malware attacks. By then, it had breached 88% of all Fortune 500 companies, 2,500 organizations total, and 76,000 computers in 196 countries. The Zeus botnet was a group of programs that worked together to take over machines for a remote “bot master.” It originated in Eastern Europe and was used to transfer money to secret bank accounts. More than 100 members of the crime ring behind the virus, mostly in the U.S., were arrested in 2010. It’s not as prominent today, but some of the virus’ source code lives on in newer botnet viruses and worms. Zeus caused documented damage of $100 million. But the real cost in terms of lost productivity, removal, and undocumented theft is undoubtedly much higher. A $3 billion estimate, adjusted for inflation, puts this virus at a cost of $3.7 billion in today’s dollars.

7. Code Red – $2.4 billion

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

8. Slammer – $1.2 billion

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

9. CryptoLocker – $665 million

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

10. Sasser – $500 million

The Sasser worm was written by a 17-year-old German computer science student named Sven Jaschan. He was arrested at the age of 18 in 2004 after a $250,000 bounty was posted for the computer virus’ creator. A friend of Jaschan’s tipped authorities that the youth had penned not only the Sasser worm but also the damaging Netsky.AC attack. Jaschan was given a suspended sentence after it was found he was a minor when he wrote the malware. The Sasser worm crashed millions of PCs, and though some reports put damages at $18 billion, the relatively low infection rate suggests a more likely cost of $500 million. Other notable viruses The top 10 worst computer viruses above are just the ugly tip of a gargantuan digital iceberg. With a million new malware programs popping up every 3 years, we may miss the forest for a few outstanding trees. Here are just a few more viruses that have wreaked havoc over the years: Mimail: This worm tried to harvest data from infected machines to launch a string of DDoS attacks, but was relatively easy to remove. Yaha: Yet another worm with several variants, thought to be the result of a cyber-war between Pakistan and India. Swen: Written in C++, the Swen computer worm disguised itself to look like a 2003 OS update. Its financial cost has been pegged at $10.4 billion, but not reliably. Storm Worm: This worm showed up in 2007 and attacked millions of computers with an email about approaching bad weather. Tanatos/Bugbear: A 2002 keylogger virus that targeted financial institutions and spread to 150 countries. Sircam: A computer worm from 2001 that used counterfeit emails with the subject line, “I send you this file in order to have your advice.” Explorezip: This worm used fake emails to spread to every machine on thousands of local networks. Melissa: The most dangerous computer virus in 1999, Melissa sent copies of itself that looked like NSFW pics. The U.S. FBI estimated cleanup and repair costs at $80 million. Flashback: A Mac-only virus, Flashback infected over 600,000 Macs in 2012 and even infected Apple’s home base in Cupertino, Calif. In 2020, there’s now more malware on Macs than on PCs. Conficker: This 2009 virus still infects many legacy systems and could do significant damage if it ever activates. Stuxnet: This worm is reported to have destroyed Iranian nuclear centrifuges by sending damaging instructions.
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A Quick Guide to Resolving Error 1512

Error 1512 - What is it?

Error 1512 is a type of runtime error code. This error may hamper your ability to run and load your desired programs on Windows PC. There are increased chances of runtime error 1512 occurring when system files go missing or get corrupt. Symptoms of this error code include:
  • Slow PC speed
  • Window System freeze

Solution

Restoro box imageError Causes

There are several for the occurrence of runtime error 1512. These include:
  • Faulty or outdated drivers
  • Poor Program installation
  • Damaged Windows Registry
  • Viruses tampering the system settings/memory
  • Broken or incorrect Registry entries
  • Damaged Windows registry

Further Information and Manual Repair

To resolve this issue you don’t have to hire a professional and spend hundreds of dollars to get it fixed. Here are some of the best and easy do-it-yourself methods to repair error 1512 on your system in a few minutes. These methods are very easy to work around and do not require any kind of technical expertise.

Method 1 - Uninstall and then reinstall the Same Program

Sometimes this runtime error may pop up due to poor program installation. In such an event, it is advisable to uninstall the program and then reinstall it again properly. To do so, go to the start menu, and click on control panel. Now select the program & features option. Here you will find the option Add/Remove Program. Remove the program causing error 1512. Once the program is removed, reinstall it again.

Method 2 - Run an Antivirus Program

Computer viruses are capable of tampering with system settings. Due to this reason you might experience runtime errors like 1512 on your PC. These malicious programs usually enter the system through phishing emails or website downloads. To resolve the issue, you need to run a powerful antivirus program. An antivirus removes all sorts of malicious programs hiding in your PC like malware, spyware, and malware that are responsible for generating runtime errors.

Method 3 - Update the Outdated Drivers on your PC

If the error still persists, then it is suggested to update outdated drivers. Faulty and outdated drivers can also trigger runtime error 1512. To do this, go to the Device Manager. Here use the Driver update wizard to make updates.

Method 4 - Remove the Invalid Registry Entries and Repair the Damaged Registry

The best way to perform both tasks is to download Restoro. It is embedded with a registry cleaner that is quite easy to use. The registry cleaner removes all invalid entries in seconds, cleans the cluttered registry by wiping out all the redundant and unnecessary files. The damaged registry is then repaired and resumes its normal function. Click here to download Restoro and resolve runtime error 1512.
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Mapi32.dll Outlook Error - Quick Fix

What is Mapi32.dll Outlook Error?

Mapi32.dll is a Windows Messaging Application Programming Interface that enables Windows to perform various email functions and launch messaging programs like Microsoft Outlook and Microsoft Office. The inability of the interface to execute email functions properly results in the Mapi32.dll Outlook Error. This error occurs mostly when you are attempting to upgrade the operating system to a new version.

Solution

Restoro box imageError Causes

The common causes of the Mapi32.dll Outlook Error during the OS upgrade are:
  • Damaged or Corrupt Outlook user profile
  • The software is overwritten by some other program
  • Outlook PST file corruption
The Mapi32.dll Outlook Error message is displayed in either of the following forms:
  • Mapi32.dll is missing
  • Cannot start Microsoft Office Outlook. Mapi32.dll is corrupt or the wrong version.
  • Mapi32.dll was not found
  • Mail is not installed

Further Information and Manual Repair

So, what if you experience this issue and how do you fix it? Well, first there is no need to panic as Microsoft has recognized this issue and provided adequate solutions to fix this problem in no time. However, to ensure the Mapi32.dll Outlook error is a quick fix, you must first understand the cause of the issue and the message displayed on the screen.
  1. Let’s say the errors occur because your Outlook profile is corrupt. In this scenario, the best solution is to create a new Outlook profile. Regardless of whether you have Windows Vista or XP, to create your new Outlook profile, first, you will have to click on the Control Panel, then User Account, and then Mail. Once you click on the Mail tab, the mail set up dialog box will open. In this dialog box there will be a ‘Show Profiles’ tab, click and then click the Add tab that appears next. Now type the name for your new Outlook profile and then click ‘OK’. After that, add an email account to go with the profile.
  2. If Mapi32.dll is missing or corrupt, you will have to run ‘Fixmapi.exe’ to resolve the problem. It is located in the System32 folder inside the Windows directory in Windows Explorer.
  • Therefore, first start Windows Explorer and then locate the following folder on your computer: C: /Program Files/Common Files/System/Msmapi1033
  • Now find Fixmapi.exe and double click it
  • After that locate the Mapi32.dll file and rename it to MSmapi32.old and press enter.
  • Restart your computer when finished.
A word of advice for computer users is to scan for viruses with an antivirus program or a registry cleaner regularly to prevent the Mapi32.dll Outlook error from occurring in the first place. Viruses often latch onto .dll files and corrupt them. It’s always best to have a forward-looking approach.
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How to Manually Fix 0x8004210A Error Code on Your System

Error 0x8004210A - What is it?

0x8004210A is a typical POP3 email error message. This error may sometimes occur when you try to check your Post Office Protocol 3 (POP3) email account. 0x8004210A error code hampers your ability to both send and receive e-mails on your Outlook account. Error 0x8004210A is displayed in any one of the following formats on your PC:
The operation timed out waiting for a response from the receiving (POP) server 0x8004210a Task 'SMTP server name - Sending and Receiving reported error' (0x8004210A): 'The operation timed out waiting for a response from the receiving (POP) server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP).'

Error Causes

Error 0x8004210A occurs due to several reasons. However, some of the most common reasons include:
  • Wrong port number for the POP incoming server
  • Your connection to the mail server is too slow
  • Incoming and outgoing emails are being scanned and stopped by an antivirus installed on your system
  • The Outlook send and receive job is being blocked by Firewall
  • You are sending and receiving large series of emails or large email attachments
  • Registry issues
No matter what the cause of this error is, to resume email communication via Outlook and to ensure your work productivity is not affected, it is recommended that you resolve this 0x8004210A error code on your PC immediately.

Further Information and Manual Repair

To fix error 0x8004210A, here are some of the most efficient and easy manual methods that you can try:

Method 1

If the cause of the error is related to the internet connection then here’s what you need to do. Try freeing up your internet connection by closing any other online activities in progress or downloads being carried on your system.

Method 2

Try to increase your server time-out periods. To do this, go to the Outlook File menu and choose account settings. Now double click on your email account and more settings. Now click advanced and increase your server timeout period to resolve.

Method 3

If you are trying to send or receive large and heavy emails on your Outlook account, the error 0x8004210A may pop up. This happens because when transferring heavy files the email account automatically locks until the task is complete, however, if it takes more time the next Send and Receive job starts while the first one is still not complete. In such an event, the email server then times out and shows you the error. Therefore to resolve, you will have to show patience. Simply wait for the large email to be sent or received before you start sending another email.

Method 4

If the antivirus installed on your system is the reason for the error pop up, then disable it for a while until the operation is complete. Then enable it once the task is performed successfully.

Method 5

Similarly, if the Firewall installed on your system is preventing Outlook from reaching your mail server, then simply disable the Firewall to resolve.
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