How to fix WINDOWS 10 0xc000021a BSOD error in mandatory update KB5021233
To fix 0xc000021a BSOD blue screen generated by Windows 10 December 2022 Update, you can try these steps:
Boot your computer until you enter the Windows Recovery Environment.
As soon as the blue screen occurs, click on Troubleshoot.
Select “Start recovery, troubleshooting, and diagnostic tools”.
Select “Advanced Options”.
Select “Command Prompt”.
If you computer is not rebooting, Reboot it manually.
Sign in into your computer with your username and password.
You’ll see the Command Prompt window, and there type the following command: xcopy C:\windows\system32\drivers\hidparse.sys C:\windows\\system32\hidparse.sys. If your Windows operating system is not on C;\ Drive, change the path to your specific partition letter .
Once done, type: Exit and select the “Continue” button.
Your device will should reboot properly now.
As soon as you reboot, your computer should work properly.
We hope that these troubleshooting steps will help you solve the error.