Have error after update WindowsXP

After I update my WindowsXP, I got a blue screen, display:
"STOP: c000021a {Fatal System Error}
The windows Logon Process system process terminated unexpectedly with a
status of 0xc0000018 (0x00000000 0x00000000)
The system has been shut down."

How can I do? Now I install new windows in new folder and have problems with
drivers.
Please help me.

Furthermore, I've try to restore the system and login the safe mode.
However, it still have the same problem.

"Nu+ Muk" wrote:

> After I update my WindowsXP, I got a blue screen, display:
> "STOP: c000021a {Fatal System Error}
> The windows Logon Process system process terminated unexpectedly with a
> status of 0xc0000018 (0x00000000 0x00000000)
> The system has been shut down."
>
> How can I do? Now I install new windows in new folder and have problems with
> drivers.
> Please help me.