Hi. The STOP 0xC000021A error occurs when either Winlogon.exe or Csrss.exe
fails. When the Windows NT kernel detects that either of these
processes has stopped, it stops the system and raises the STOP
0xC000021A error. This error may have several causes. Among them are
the following:
- Mismatched system files have been installed.
- A Service Pack installation has failed.
- A backup program that is used to restore a hard disk did not correctly restore files that may have been in use.
- An incompatible third-party program has been installed.
Booting the computer to its Last known good configuration will resolved the issue. Please see procedure below:
Turn of the computer
Keep on tapping F8 key the moment you press the power button
You should be getting a advanced boot screen
Select Last known good configuration from the selections then hit enter
Computer should be booting up by now to windows
All the best!
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