Hi Supasiri R.,
Have a look at these MSKB articles:
How to troubleshoot a "STOP 0xC000021A" error
http://support.microsoft.com/default.aspx?scid=156669
How to recover from a corrupted registry that prevents Windows XP from
starting
http://support.microsoft.com/kb/307545/
(Please take note of the Warning in the SUMMARY section!)
--
Patti MacLeod
Microsoft MVP - Windows Shell/User
"Supasiri R." <> wrote in message
news:664DA23C-8549-4B3C-9BC1-...
> Hello again everyone,
>
> I just downloaded updates on my desktop and everything went just fine
> until
> the system restarted and it didn't work. Here's what it says on a blue
> screen
> after the system restarted:
>
> Stop:- 0000021a [Fatal]
> System Error
> The Windows logon process system process terminated unexpectedly with a
> status of the system has been shut down.
>
> and that was it. The computer just stopped working and I'm stuck with a
> blue
> page saying exactly like above. I think I've just killed my desktop with
> the
> updates!?!
>
> Any suggestions? I'd really want to get my desktop back.
>
> Cheers,
> --
> Supasiri Rachatanich
> Bangkok, Thailand