Are you the one struggling with the Windows error 0xc0000021A during installing updates or others, then this article is for you? Here learn the complete information about the error code 0xc0000021A and how to fix it permanently in the Windows 10, 7, 8 and 8.1.
Windows is highly used system and this is also not free from errors. There are many errors faced by the users at the time of released or during installing updates.
The Windows error code 0xC000021A is a common error faced by almost all Windows version users. The error 0xC000021A is a Blue Screen of Death or BSOD error and faced by the users when the Windows user-mode subsystem is compromised.
Well, the 0xC000021A error appears on the Windows system in many different ways so here check some of them:
- STOP 0xC000021A
- STATUS_SYSTEM_PROCESS_TERMINATED (Status System Process Terminated)
- HALT: c000021a {Fatal System Error}
- STOP c000021a
This is very irritating and there are many reasons responsible for getting the stop error 0xC000021A in Windows 10. Check out some of the possible ones:
Causes Of the Error 0Xc000021A:
The error 0xC000021a commonly appears when either the Winlogon.exe or Csrss.exe fails to work. Winlogon.exe is used for login and logout processes and Csrss.exe belongs to Microsoft Client or Server ‘Runtime Server Subsystem’. And when it is detected the processes stopped working, and then it automatically stops the PC and throws the STOP 0xC000021a error.
Apart from that check out some other possible ones:
- Service Pack installation was failed.
- The installed third-party program is incompatible.
- The backup program that was used for restoring hard disk did not correctly restore the files that might be used.
- Due to the outdated software or drivers
- System registry corruption or damage
So, these are some of the common reasons responsible for the error code 0xC000021a. Now try the given fixes to get rid of the error.
How to Fix Windows Error Code 0xC000021a
Well, there are many simple tweaks that help you to fix the error 0xC000021a. But before moving towards the fixes first restart the computer, check for the viruses and malware, run an SFC scan and check if the error 0xC000021a is resolved. But if not then follow the below-given fixes one by one:
Solution 1: Boot into Last Known Good Configuration
You can fix the error by making use of the last known Good configuration. For this, you need to start the PC with the last known good configuration. Follow the steps given below.
Please Note: as there are numerous versions of Microsoft Windows, the steps might are also different on the PC. If they are, then see your product documentation for completing these steps.
- Very Firstly click on Start and then click on Shut Down.
- Then click Restart and after that click
- Press F8 keys during indicated time.
- For x86 – based PC: When the screen of text appears and disappears, then press F8 key. (The screen of text may include a memory test, lines about the BIOS, and other lines.) Or prompt will appears that display message to press F8 key.
- For Itanium architecture-based computer: After making your selection from the boot menu, press F8 key. Or the prompt appears that display message to press F8 key.
- Make use of the arrow keys for selecting the Last Known Good Configuration, and then press
Note: NUMLOCK should be OFF before the arrow keys on the keypad will function.
- Make use of the arrow keys for highlighting OS and press
Notes
- The Last Known Good Configuration startup option offers a method to recover from issues like a newly added driver that might be incorrect for your hardware. But, it does not solve problems that are caused due to corrupted or missing drivers or files.
- While choosing the Last Known Good Configuration option, only the information in registry key HKLM\System\CurrentControlSet is restored. Any changes made in other registry keys remain.
If the above-given steps do not help to fix the error 0xC000021A then you can make use of the solution no. 2.
You May Also Read:
- 5 Methods to Fix Windows 10 Update Error Code 0x80070652
- 6 Working Solutions to Fix Windows 10 Update Error 0x80071a91
- Top 8 Tweaks to Fix Windows Update Error 80244019
Solution 2: Revert The Failed Windows Update
Possibly the stop error 0xC000021a occurs when the user shut down the PC while applying updates. And then the user forcibly tries to turn off the PC when it is not shutting down as it is waiting for updates to be applied. Here we have given ways to revert the failed Windows update:
- First of all, insert the Windows 8/8.1 installation DVD or USB or Recovery disk
- Then restart your PC > click Next
- Then click Repair your computer link
- After that click on Troubleshoot > Advanced Options,> Command Prompt
- And in Command Prompt type dism.exe /image:C: /cleanup-image /revertpendingactions (here C is your computer’s system drive)
- Hit Enter to run the command and reverts the updates.
Solution 3: Perform a Clean Boot
Performing a clean boot helps the users to fix the error 0xC000021a in Windows 8, 8.1 and 10
Follow the steps to do so:
- Boot into the system > go to Desktop > click Start
- Press Windows + R key > in Run dialog box > type msconfig > hit Enter
- Now go to the General tab > at the System Configuration window
- Click Selective startup > and uncheck Load startup items
- Go to Services tab > check to Hide all Microsoft services
- click disable all > Startup tab > and disable all the service listed there
- Restart the computer
And now check the 0xC000021a error is fixed or not. If the error is fixed then the service listed in the startup is causing the error and to know which service is causing the error. Go back to msconfig > enable each service one by one and restart the computer till the error appears again.
But if in case, still struggling with the same error follow the second solution.
Solution 4: Uninstall Software or Drivers
It might happen you are getting the error due to recently installed software or drivers. So check for the recent changes and uninstall the recently installed software. Check the drivers and uninstall them.
Also, check for the outdated drivers and update them from the manufacturer website or from the Microsoft official website.
Apart from that also make use of the Driver Booster to update the drivers automatically.
Solution 5: Run DISM Command
Try running the DISM command in many cases this help the users to fix the error. Running the DISM command helps the users to fix various Windows errors.
To know more about the DISM command read this: Methods to Utilize DISM Command to Fix Windows 10 Image
Solution 6: System Restore
Try performing the System Restore in Windows 7/8/8.1 and 10, then this helps you to revert back your system to an earlier state.
So follow the steps to do so:
- Restart the computer > press the F8 key or the F11 key
- Select a keyboard layout if prompted > click Troubleshoot
- Click Advanced Options > System Restore
- Choose the operating system >and the System Restore will now open > Next
- And choose a restore point > Next
- Then to confirm the restore point > click Finish
- Click Yes at the warning message > wait for the process to finish
Now check whether the error 0xC000021a in Windows 7, 8, 8.1 and 10 is fixed or not.
Check Your Windows PC/Laptop Health
You can also scan your Windows system with Windows Repair tool, to fix various Windows update errors and other related issues. This is the advanced tool that scan, detect and repair various Windows operating system issues such as corruption, damages of the Windows system files, malware/viruses, protect you from file loss, hardware issues and many more. Apart from fixing the errors this also optimizes the Windows PC performance and speed up the Windows PC without any hassle. It is easy to use even a novice user can use it easily.
Conclusion:
Hope the article works for you to fix Windows error 0xC000021a.
I tried my best to put together the entire working solutions to fix error 0xC000021a in Windows 7, 8, 8.1 and 10.
Apart from that, you can also scan your system with the automatic Windows repair tool to optimize your PC performance by fixing the common issues automatically.
Also, check the device drivers and update them, delete the temporary files, scan your system with good antivirus software and remove unwanted software from time to time to maintain the Windows PC performance and other issues.
Additionally, if you find the article helpful or have any query, comment, questions or suggestions related, then please feel free to share it with us in the comment section below or you can also go to our Fix Windows Errors Ask Question Page.
Good Luck!!!
