windows xp won't restart or turn off my computer

[Guest Peter]

Hi all,

 

I have the following problem with one of my systems. Windows XP SP1 (fresh

install) won't restart or turn off the computer. Basically, it goes through

the shutdown process, the screen goes black but all hardware keeps working.

The only way to restart after that is by pressing the reset button and the

ony way to shut it off completely is by holding the power button. Any help

would be appreciated.

 

P.S. The OS is installed on a RAID0 - 2 WD Raptors 36 GB each.

 

Thanks