The 0xC000021A error can occur if there were corrupt system files in the computer, a failed upgrade, or an incomplete installation of a software program.
Run SFC Tool
Run Windows Defender Antivirus Tool
Update/Uninstall Device Driver
Uninstall Problematic Windows Update
Run CHKDSK Command
Uninstall Incompatible Software/Application
Perform System Restore
The error “Your amazing PC ran into a problem and wants to restart Windows 10” can very well appear when updating Windows. Then your computer will not boot normally or show the current screen along with blue mode error 0xc000021a. Winlogon.exe and csrss.Files exe have always been the root cause of some errors.
Did you run an SFC scan on a Windows ten drive by booting “safe mode with networking” from the Windows ten installation media? Error 0xC000021A occurs when Winlogon.exe or Csrss.exe has stopped working. This happens when: System files have been corrupted on a nearby computer. Extension error. Incomplete installation of the software system.
In fact, Windows does not allow you to run unsigned drivers on your PC. Thus, if you recently installed drivers from third-party sources, your operating system will not boot due to driver signature enforcement. This, in turn, results in error 0xc000021a.
How do I fix error 0xc00021a?
Fix Windows 10 stop code 0xc000021a issue
What is error 0xc00021a?
This Windows 10 exit code 0xc000021a says “Your PC has encountered a problem and needs to restart. This error occurs every time you restart your computer. However, you cannot restart your computer or laptop because the system is undoubtedly locked.
How do I fix stop code 0xc00021a?
Fix Windows 10 stop code error 0xc000021a
How do I fix the blue screen stop code 0xc00021a?
Fix Windows 10 shutdown password error 0xc000021a
What causes 0xc00021a?
Error 0xC000021A is a proper blue screen of death or even a BSoD error (related: blue screen of death guide) that occurs when the Windows user mode subsystem is actually compromised.
Ermias is a tech writer with a passion for helping people solve Windows problems. He loves to write and share his knowledge with others in the hope that they can benefit from it. He’s been writing about technology and software since he was in college, and has been an avid Microsoft fan ever since he first used Windows 95.