Whats wrong with my computer?

[Terrorcell]

So I've had my computer for about two years now. I've got windows XP Home Edition on it and most of it runs fine.
My problem is that when I shut it down (by going to start, shutdown) , and this only started recently, just when the computer is about turn turn off, a big blue error screen comes up with the message:

Code: ags

STOP: c000021a {Fatal System Error}
The Windows Logon Process System process terminated unexpectedly with a status of 0x00000000 (0x00000000 0x00000000).
The system has been shut down.

I've run a check useing Trend Micro PC-Cillan 2008 and nothing came up. I've also run a defrag and a disk check aswell as a registry check and repair. I don't understand what the problem is

Any insight to how to fix my problem would be greatly appreciated, Terrorcell.

[monkey0506]

Google produced this from Microsoft. I'd say it's safe enough to trust them since it is their software messing up...and they're admitting it.

[Terrorcell]

Ha! Excellent  Thanks alot!

[Terrorcell]

Sorry, I followed the steps that microsoft gave me on it's website but the problem is that Dr Watson cant produce an error log because it is already closed (fully) before the error occurs. I tried the Process Dump aswell but with the same result  :'(