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MSASCui.exe - Quick Fix Guide

MSASCui.exe is a digitally signed file from Microsoft located in folder C:\Program Files\Windows Defender.

It is a component of Microsoft Windows Defender Antispyware. This file is responsible for performing spyware scans. It is already installed in Windows Vista operating system. MSASCui.exe becomes an error code when it is found in another path. It is categorized as a Windows runtime error.

Solution

Restoro box imageError Causes

The cause of MSASCui.exe error is triggered by:

  • Corrupt or damaged registry entries
  • Virus Infection

The potential risks of MSASCui.exe error are:

  • Slow PC performance
  • Data loss

When this file becomes an error, it will display messages like:

“This application has failed to start to run on Windows because MSASCUI.exe cannot be found.”

“Windows Defender cannot work properly and protect the Windows system effectively”

The message will keep popping up on your computer screen time and again.

Further Information and Manual Repair

When you experience an MSASCui.exe error on your PC, it is advisable to fix and repair it immediately before it causes serious damages to your system.

Here are some DIY quick solutions to repair MSASCui.exe error:

Solution 1:

If the speed of your PC reduces significantly and you also see MSASCui.exe error message pop on your screen, then in this case it is advisable to uninstall the Windows Defender program from your PC.

To do so, follow these instructions:

  • First, open the Windows Task Manager by pressing the “Ctrl, “Alt” and “Delete” keys on the keyboard.
  • Now click the ‘Processes’ tab. This will show the currently running processes on your system.
  • Scroll down and click on “MSASCui.exe” and then end the process. This will stop the program from running on your PC.
  • After this go to the start menu and double click on ‘My Computer’ and click on the C drive.
  • Choose the option ‘Program Files’ and then click on the ‘Windows Defender’ folder.
  • Now to delete this folder, right-click and select ‘delete’. This will uninstall the program, fix the MSASCui.exe error, and also improve the performance of your PC.

Solution 2:

If you find the MSASCui.exe file located in some other path, then this is an indication of a virus.

In this case, it is recommended to run an antivirus program on your PC to scan and delete all viruses.

If you don’t have an antivirus program already installed on your system, then you should download it. Once antivirus software is downloaded, simply run it to scan viruses and then click on delete to remove all the viruses on your system.

This will help you resolve the MSASCui.exe error caused by malware on your PC right away.

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Guide to Quickly Fixing the Thorconnwndclass
Thorconnwndclass error is an Outlook error that has recently reared its head. Known to create several problems in the proper functioning of the Outlook application, this error is essentially a constituent of the Norton Antivirus Crash Guard Symantec component. That’s why those using the Norton Antivirus program are most likely to encounter this error.

Solution

Restoro box imageError Causes

When the Thorconnwndclass error occurs, the Outlook closes unexpectedly, users encounter problems while sending or receiving emails and, performance of Outlook is degraded and this happens because issues arise while accessing the PST file. Because of this damaged PST file, stored data is unavailable for access. Other factors that trigger the Thorconnwndclass error are listed below.
  • Corrupt or damaged Outlook Add-ins
  • Corrupt or damaged Outlook bar
  • Unfinished Outlook installation
  • Faulty settings
  • Thorconnwndclass Norton is being used with Outlook
Regardless of the underlying factors that lead up to the occurrence of this error, it's of paramount importance that workarounds are implemented to ensure desired performance of Outlook in the long run.

Further Information and Manual Repair

While there are several ways to rectify this error, some of the most common ones are listed below as follows.
  • The most effective solution is the PST file repair tools available online. These tools use a complex algorithm and thoroughly scan the PST file and repair it as needed. This resolves the Thorconnwndclass error that one encounters in Outlook. Usually such software have an easy to use interface and can easily be used, without the need for the user to have a strong technical background. Another advantage of using these software available online is that they not only repair the file, but they often play a pivotal role in retrieving inaccessible or lost data.
Some other tips for manually resolving this problem are listed below as follows.
  • First and foremost, disable your Norton Antivirus program if it’s installed on your system. Now, open the Outlook application in Safe Mode. Since this problem may also be triggered by damaged or corrupt Outlook add-ins, it is strongly advised that you disable or uninstall them. Now, you will come across some .dat files. Rename them by changing the existing .dat files to new .dat.
  • Another useful approach is to employ the Inbox Repair tool offered by Outlook.
  • Finally, one can also use the scanpst.exe file to fix any problem or error that resides within the  Outlook application.
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Disabling Auto Update in Chrome & Firefox
As you know, all the web browsers come with the support of auto-updates which include both Google Chrome and Mozilla Firefox. However, with these updates, the browser comes with the support of a new web APIs and better rendering. Although there could be a lot of problems that may arise due to these updates. These problems consist of depreciation of features, incompatibility with some websites, to name a few. It includes incompatibility with some websites, depreciation of features, and more. This might push someone to stop the auto-updates of these web browsers. So, in this guide, we will be checking out how to stop auto-update in Google Chrome and Mozilla Firefox on Windows 10. Thus, if you want to be rid of these issues, then you can disable the Chrome & Firefox auto-update and you can do that by either using the Windows Services Manager and the System Configuration utility.

Option 1 – Disable Chrome & Firefox auto-update via Windows Services Manager

The first thing you can do to disable the Chrome auto-update is through the Windows Services Manager. To do so, follow these steps:
  • First, tap the Win + R keys to open the Run dialog box.
  • Next, type “services.msc” in the field and hit Enter to open the Windows Services Manager.
  • After that, you will see a list of services and from there, look for the Google Update Services (gupdate) and Google Update Service (gupdatem).
  • Once you find these services, right-click on each one of them and select Properties and then make sure that the Service Status is set to be Stopped.
  • You should also select the Startup Type to Disabled and click on the Apply and OK buttons.
  • Now restart your computer. This should stop the automatic update of the Chrome browser.

Option 2 – Disable Chrome & Firefox auto-update via System Configuration utility or MSConfig

  • Tap the Win + R keys to open the Run utility and type “msconfig” in the field and tap Enter to open the System Configuration.
  • After that, go to the Services tab and uncheck the two entries, namely Google Update Service (gupdate) and Google Update Service (gupdatem).
  • Next, click on the Apply and OK buttons to save the changes made.
  • Restart your computer.
Note: Now that you’ve stopped the auto-update in Firefox, it’s time for you to stop the auto-update in Mozilla Firefox. To get started, follow the steps below.
  • Open the Mozilla Firefox browser and click on the hamburger menu located on the top-right portion of the screen.
  • After that, select Options and under the General panel and then go to the Firefox Updates section.
  • Next, click on the radio button for updates but select the option to let you install them.
  • You also have to uncheck the options named “Use a background service to install updates” and “Automatically update search engines”.
  • Once done, restart the Firefox browser. This should stop the automatic update.
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Remove login screen in Windows 10
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How To Fix Error 0x00000050

0x00000050 - What is it?

0x00000050 is a type of stop error code. It is also known as a Blue Screen of Death error. It usually occurs when you try to start your PC or load a program. It can also occur while running a program. This error may also pop up when you restart your PC after installing Windows XP Service Pack (SP1) on your computer. Unlike some PC related errors, 0x00000050 error code occurs without any warning. The stop 0x00000050 error is displayed in a blue screen and interrupts you from carrying your desired activities on your PC smoothly. This error message is prompted in the following format:

Stop 0X00000050 (parameter1, 0, parameter3, parameter4) PAGE_FAULT_IN_NONPAGED_AREA”

Solution

Restoro box imageError Causes

Stop 0x00000050 error code may pop up on your Windows computer screen due to multiple causes. The most common causes for this error code include:
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  • Incompatible DLL files
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  • Spyware and viruses
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It is advisable to resolve 0x00000050 error code on your PC right away. BSOD errors are fatal errors and can pose serious threats to your PC. If not fixed timely it can lead to system crash, failure and valuable data loss.

Further Information and Manual Repair

To prevent data loss and system failure, there are some effective methods to resolve Stop 0x00000050 error code on your PC.  To implement these solutions on your PC, you don’t need to be a technical whiz or a computer programmer.

Method One

If the error cause is the conflict between Windows XP SP1 and the display adapter drivers then here’s what you need to do to resolve it:
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  2. Once you select it press enter. Now use the arrow keys to select the operating system, press enter to start your computer in safe mode.
  3. Go to Start, click Run and then type ’msinfo32’ in the open box and press OK to continue. Then under the System Summary option, expand Components and then click Display to note the information that corresponds to the INF File Item. And then simply quit the utility.
  4. After that, go to the start menu again and then the My Computer and Properties option.
  5. Press the Hardware Tab and then click the Device Manager tab. Go to the ‘Display Adapters’ option and press the option ‘Uninstall. To confirm action press OK.
  6. Once again, go to the start menu and run and then type the following commands as illustrated below and after each command press enter.
  • ren %systemroot%infINF file name from Step 5.inf *inf.old
  • ren %systemroot%infINF file name from Step 5.pnf *pnf.old
This procedure may look pretty lengthy but it is worth it. Once you insert the commands, close all open windows and then reboot your system. Now download the latest drivers for your display adapter and install them. This will hopefully resolve the 0x00000050 error code on your system.

Method Two

Sometimes 0x00000050 BSOD error may occur due to temporary issues like overheating PC components. In times like these, all you need to do to fix the issue is to switch off your computer and allow the components to cool down. Try starting your PC after a few hours.

Method Three

If the issue is triggered by malware, then it is advisable to download a powerful antivirus. Scan your entire PC to detect and remove viruses affecting your PC and generating BSOD errors on your system.

Method Four

However, if the error still persists after trying all the methods stated above, then this means the cause of the error is deep-rooted. It is related to the Windows registry. Registry stores all your system files and activities performed on your PC. It usually gets damaged and corrupt if it is not cleaned frequently. The registry loads with unnecessary and obsolete files like junk files, cookies, internet history, bad registry keys and invalid entries. These files if not removed, accumulate and damage the registry, DLL files, and system files too thereby generate BSoD errors like 0x00000050 error messages. You can clean and repair the registry manually but it requires a great deal of expertise. The ideal and easiest way to clean it is to download Restoro. This is highly functional and easy-to-use software. It is embedded with multiple powerful utilities including such as a registry cleaner, an antivirus and a system optimizer. The registry cleaning feature scans for all errors related to the registry. It removes obsolete files, invalid entries, restores damaged DLL and system files. The antivirus feature simultaneously detects and removes all kinds of malware. These include viruses, Trojans, spyware, and adware affecting your PC. While the system optimizer feature ensures that your PC functions at its optimum speed. It is a safe and powerful PC Fixer. It has a user-friendly interface and compatible with all Windows versions. Click here to download Restoro and Fix Error 0x00000050
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Fix 0xC03A0005 error in Windows 10
When performing a Windows Backup to the NAS device (backup to a network share) that is running Samba, fails with an error message The backup failed, The version does not support this version of the file format (0xC03A0005). The problem occurs because of a conflict with the VHD file that is created by Windows Backup and is mounted during the process. There are three types of VHD files:
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The solution is to use Strict Allocate: option in the smb.conf file

Login to SMB using SSH. Open the configuration file using the VI editor located at /etc/samba/smb.conf. If the option is not there, you can manually add strict allocate = yes which will make sure there are no sparse file that is created.
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A Guide to Quick Fixing the Error Mscomctl.ocx

What is Mscomctl.ocx?

Mscomctl.ocx is a Microsoft library Windows Common Controls file. The Mscomctl.ocx error occurs when this file is either lost or gets corrupt. The error is displayed on the screen when the user tries to run a program that is dependent on this file. It appears as:

“Component 'MSCOMCTL.OCX' or one of its dependencies not correctly registered: a file is missing or invalid”

Solution

Download Available to Completely Repair the Error Mscomctl.ocx

Restoro box imageError Causes

Installing and then uninstalling a large number of applications on the Windows operating system often corrupts or unregisters the Mscomctl.ocx library. This message will continue to appear on the screen until you re-register the library file again on your system.

Further Information and Manual Repair

You don’t need to have the sound technical knowledge or call a professional to resolve Mscomctl.ocx error on your PC. The Mscomctl.ocx error is easy to repair and can be fixed in a couple of minutes. Here are 2 solutions to repair the Mscomctl ocx error code on your system:

Cause: Error occurs because the Mscomctl ocx file is unregistered

Solution:

  1. Go to the start menu and type ‘Mscomctl.oxc and press enter
  2. Copy the ‘Mscomctl.ocx’ file and paste it in "C:WindowsSystem32" folder
  3. Now click the start menu again and type ‘CMD’ in the search box. This will open your computer's command prompt.
  4. Once this opens, type either of the following commands and then press enter. If you have a 64-bit operating system, then type: Regsvr32 "C:WindowsSysWOW64MSCOMCTL.OCX” and if you have 32-bit operating system, then you should type ‘Regsvr32 "C:WindowsSystem32MSCOMCTL.OCX"
By doing this, you will be able to register the Mscomctl.ocx file on your PC and then you will no longer receive Mscomctl.ocx error code.

Cause: Error code occurs because the Mscomctl.ocx file is missing

Solution:

  1. First search for MScomctl ocx on your local drive to see if it is missing.
  2. If the file is missing, then download the MScomctl.exe file from a reliable website.
  3. Now extract the file to your C:WINDOWSsystem32 directory
  4. Then click start and run.
  5. Now type ‘REGSVR32 MSCOMCTL.OCX’ and press enter
Please note to implement any of the two solutions stated above, you will need administrator rights. If you have the administrator rights then only can you make the above registry changes. Therefore to make the following changes you will have to access the PC using the Administrator account. Simply follow the instructions given above to repair this error code problem right away!
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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:
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  • 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.
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Resolve Error 0x80240020 in Windows 10

Error Code 0x80240020 – What is it?

Error code 0x80240020 is a Windows 10 upgrade error code that affects users who attempt to upgrade their Windows operating system. This may occur due to a particular program that blocks the upgrade from completing. It can also result when other PC issues interfere with the upgrade process by disrupting the ability of Windows Update to download updates on one’s machine. Common symptoms of error code 0x80240020 include the following:

  • Message box detailing the presence of error code 0x80240020
  • Inability to complete Windows 10 upgrade process

Solution

Restoro box imageError Causes

Upgrade error codes occur when Windows users experience upgrade failure while using Windows Update, the Microsoft Windows Update website, the Microsoft Update website, or the Windows Server Update Services (WSUS) server. Disruption may cause this process to fail, for instance, due to system file corruptions or problems related to the Windows Update services.

Further Information and Manual Repair

To correct issues related to error codes, it is often best to apply manual repair methods. These help Windows users determine the root causes of the error code and provide solutions that permanently fix these issues. For instance, if error code 0x80240020 on your machine is due to an issue within the Windows Update tool, you will need to first verify that this is the problem by using a troubleshooter option found within your machine’s settings. The troubleshooter will detect and fix the issue.

Most of these manual repair methods can be implemented by any Windows user, regardless of their background, technical abilities, or lack thereof. However, in certain cases, technical skills are required. If you have trouble implementing the procedures highlighted below or in any other error code article found on this site, consider getting help from a Windows repair technician or use a powerful automated tool.

Below are details regarding the manual repair methods for fixing error code 0x80240020. Ensure you follow the instructions correctly. After all, any error you make will likely cause further problems on your machine and prevent you from resolving error code 0x80240020 in Windows 10.

Method One: Run Windows Update Troubleshooter

One way to fix error code 0x80240020 is to troubleshoot Windows Update. To do this you will need to access Settings within your machine then simply select the relevant troubleshooting options available. Follow the instructions below:

  • Step one: Type Settings within search box near Start button then press Enter
  • Step two: In the search box within Settings, type Troubleshooting
  • Step three: Select the troubleshooting option
  • Step four: Under System and Security, select Fix problems with Windows Update
  • Step five: Under Windows Update, select Resolve problems that prevent you from updating Windows.
  • Step six: Click Next and wait for the troubleshooter to detect and fix problems

If there are problems with Windows Update, the troubleshooter will be able to fix them. Once this process is complete, restart your PC and then reopen Windows Update. Attempt to upgrade your Windows operating system. If Windows Update completes the process and your machine downloads and runs the upgrade, you have successfully resolved error code 0x80240020.

If, however, there is another upgrade failure and the message box detailing the presence of error code 0x80240020 in Windows 10 appears, you will need to apply another manual repair procedure. Please see below for further details regarding manual repair method two.

Method Two: Use SFC to Scan and Fix Corrupted System Files

Corrupted or missing system files may interfere with your machine’s ability to successfully download an upgrade. For this reason, scan and fix any problems related to system files on your machine using Command Prompt. This manual repair method is often called a System File Check/ Checker (SFC).

  • Step one: Right-click Start Menu
  • Step two: Select Command Prompt (Admin)
  • Step three: Type sfc /scannow

To ensure you follow this procedure correctly, enter the command as it is written above, with a space between “sfc” and “/scannow”. Once missing, corrupted or damaged files are present on your machine, the SFC command will enable Command Prompt to scan and fix these issues.  Wait until the process is complete then reboot your PC.

With your system successfully rebooted, reattempt the Windows 10 upgrade process in Windows Update or on the Windows Update website. If the issue causing error code 0x80240020 was related to problems with system files, you should be able to complete the upgrade after using the SFC tool.

Method Three: Download an Automated Tool

If you wish to always have at your disposal a utility tool to fix these Windows 10 and other related issues when they do arise, download and install a powerful automated tool.

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Fix Windows Upgrade Error 0x800701E3
There are various components that take part during a Windows Upgrade process such as the CPU, Disk, Network, and many more. This is why the process of upgrading your Windows 10 computer can be quite complex and due to its complexity, there are times when you might encounter some errors like the Windows Upgrade error 0x800701E3. If you encounter this kind of error then it has something to do with the “disk” part of the whole upgrade process which could be due to a conflict with the storage of your Windows 10 computer. When you receive this error, you will see the following error message on your screen:
“Windows cannot install required files. Make sure all files required for installation are available and restart the installation. Error code: 0x800701e3.”
To fix this Windows Upgrade error, here are some suggestions that might help.

Option 1 – Delete Files from Software Distribution Folder & Catroot2 folders

The downloaded Windows Updates are placed in a folder called “SoftwareDistribution”. The files downloaded in this folder are automatically deleted once the installation is completed. However, if the files are not clean up or if the installation is still pending, you can delete all the files in this folder after you pause the Windows Update service. For complete instructions, refer to the steps below.
  • Open the WinX Menu.
  • From there, open Command Prompt as admin.
  • Then type in the following command – don’t forget to hit Enter right after typing each one of them.
net stop wuauserv net start cryptSvc net start bits net start msiserver
  • After entering these commands, it will stop the Windows Update Service, Background Intelligent Transfer Service (BITS), Cryptographic, and the MSI Installer
  • Next, go to the C:/Windows/SoftwareDistribution folder and get rid of all the folders and files thereby tapping the Ctrl + A keys to select them all and then click on Delete. Note that if the files are in use, you won’t be able to delete them.
After resetting the SoftwareDistribution folder, you need to reset the Catroot2 folder to restart the services you just stopped. To do that, follow these steps:
  • Type each one of the following commands.
net start wuauserv net start cryptSvc net start bits net start msiserver
  • After that, exit Command Prompt and restart your computer, and then try to run Windows Update once more.

Option 2 – Try running the DISM tool

You can try running the Deployment Imaging and Servicing Management or DISM tool to fix the Windows Upgrade problem. Using this built-in tool, you have various options such as the “/ScanHealth”, “/CheckHealth”, and “/RestoreHealth”.
  • Open the Command Prompt with admin privileges.
  • Then type in the following commands and make sure to hit Enter right after you type each one of them:
    • Dism /Online /Cleanup-Image /CheckHealth
    • Dism /Online /Cleanup-Image /ScanHealth
    • exe /Online /Cleanup-image /Restorehealth
  • Do not close the window if the process takes a while as it will probably take a few minutes to finish.

Option 3 – Run the System File Checker Scan

System File Checker or SFC is a built-in command utility that helps in restoring corrupted files as well as missing files. It replaces bad and corrupted system files with good system files. To run the SFC command, follow the steps given below.
  • Tap Win + R 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.
  • Restart your computer.

Option 4 – Try running the ChkDsk utility

You can also run the ChkDsk utility to fix the Windows Upgrade error 0x800701E3.
  • First, open This PC and right-click on your operating system partition for Windows.
  • Next, click on Properties and navigate to the Tools tab.
  • Then click on Check under the Error Checking section.
  • After that, a new mini window will be opened and from there click on Scan drive and let it scan your disk drive partition for any errors and then restart your computer.

Option 5 – Run the Windows Update Troubleshooter

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

Option 6 – Run Microsoft’s online troubleshooter

Running Microsoft’s online troubleshooter might also help you fix the Windows Upgrade error code 0x800701E3. This online troubleshooter is known to help in fixing Windows Update errors, it scans your computer for issues that might be causing the problem and then fixes them automatically.
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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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