Fix c000021A Fatal System Error on Windows 11/10

If you are getting an fault while Windows 11/ten upgrade which says Cease 0XC000021A or STATUS_SYSTEM_PROCESS_TERMINATED,then information technology's a security effect within the Windows. It is also possible that the organisation files have an issue, and they take been incorrectly modified. This does non necessarily mean that at that place is a malware problem, just one of the recently installed applications might have modified or corrupted some core files. This guide will help you troubleshoot this problem.

0XC000021a, Status SYSTEM PROCESS TERMINATED

You lot get the c000021a (Fatal System Error) error when Windows detects security compromise in a user-mode subsystem, such every bit WinLogon or the CSRSS (Client Server Run-Time Subsystem). When such a organization procedure is terminated, then your system switches to kernel mode. because it can't operate without CSRSS or WinLogon.

Another cause of the c000021a mistake is mismatched files in the hard drive. You become this error afterward restoring arrangement files from a backup or installing or updating device drivers, service, or third-party software. In this instance, the restore program skips crucial organisation files, generally considering the program determined that they are in use by the organization.

This error occurs when a user-mode subsystem, such as WinLogon or the Client Server Run-Time Subsystem (CSRSS), has been fatally compromised and security tin no longer exist guaranteed. In response, the operating organization switches to kernel mode. Microsoft Windows cannot run without WinLogon or CSRSS. Therefore, this is one of the few cases where the failure of a user-fashion service tin shut down the organization.

c000021A Fatal Organisation Error on Windows 11/10

You may become the Fatal Organization Mistake from diverse factors. In this section, we'll tackle the troubleshooting methods for them all. Some fixes work only when you lot tin can access the Windows surround and some piece of work on BSoDs. Here are the solutions preferred:

1. Uninstall the offending software.
2. Run Organization File Checker
3. Gear up it with the DISM control
4. Rebuild BCD and Fix MBR
5. Repair difficult-disk errors
6. Perform Organisation Restore.
7. Use Cloud Reset pick.
8. Contact Microsoft.

If y'all cannot boot to your desktop commonly, you may accept to access Advanced Startup Options to admission the recovery tools.

1] Uninstall the offending software

Do you remember when yous showtime started experiencing the 0xc000021a error? It could be immediately afterwards you installed or updated an application, system service, or commuter.

The last software y'all installed or updated could be the culprit. If this is the case for y'all, y'all tin can fix the event by uninstalling or disabling the buggy software. Press theWindows key and R simultaneously to open the Run dialog box.

Type appwiz.cpl in the Run dialog box and click OK. Yous can click on the Installed On column to sort the apps by their install date from the list of applications. This helps you find the nigh recent installation that might've acquired the error.

Correct-click on the application and selectUninstall. Follow the on-screen instructions to complete the uninstallation.

If yous recently installed or updated whatsoever Driver software, you may want to consider removing it.

All the same, if the damage is already washed, uninstallation will non help. In that case, yous should perform a system restore to get back to a stable land of PC.

2] Run System File Checker

Run System File Checker in Safe Mode and encounter if that helps. This will repair corrupted or damaged Windows files. Yous will demand to run this command from elevated CMD i.e. command prompt launched with admin privileges.

3] Run DISM

If you gained access to the system from the previous solution but couldn't fix the c000021a mistake, you tin run the DISM command in Command Prompt.

Start, kicking your reckoner into the Windows Safety Mode with Command Prompt. In the Control Prompt window, enter the following command and run information technology by pressing ENTER:

dism /image:C:\/cleanup-image/revertpendingactions

4] Rebuild BCD and Fix MBR

Boot Configuration Data (BCD) is a firmware-contained database for boot-time configuration data. To rebuild the BCD or Boot Configuration Data file in Windows type the following command and hitting Enter. Yous volition need to employ the admin elevated command prompt.

bootrec /rebuildbcd

To get a new bootloader, type in the following command in the elevated command prompt.

C is your system drive where Windows is installed. If this doesn't piece of work, y'all can try repairing the Master Boot Record.

five] Repair hard-disk errors

This may not exist a 100% full proof solution, but y'all can run chkdsk in the command prompt to see yous don't have whatsoever outcome with your difficult drive. Y'all could execute the following command:

chkdsk c: /f /r

It is possible that when installing programs on the corrupt part of the disk might cause issues.

Related: Fault 0xc000021a or 0xc0000001, Your PC couldn't start correctly.

6] Run System Restore

You tin can resort to performing a organization restore. and see if that helps.

If you receive Stop Error 0xc000021a, and System Restore stops working after Windows 10 Update, and then its a known issue for Windows 10. This post may assistance you – System Restore not working after Windows 10 Update.

7] Perform Cloud Reset

If the organization restore doesn't fix it, your last option is to do a Cloud Reset.

8] Contact Microsoft

If nothing seems to work, y'all can ever contact Microsoft Support Squad by following this link.

TIP: More ideas to fix Windows Blue Screen errors.

All the best.

Source: https://www.thewindowsclub.com/c000021a-fatal-system-error-on-windows-10

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