pc shutting down on mohaa

hi guys,
the problem is when i play mohaa my pc will shut down. i have looked in the event veiwer but not much there in the way of helping me. my pc will stay on for 10mins, 20mins, 2 hours, but it will go of. if anyone has an idea about this PLEASE help me.

1.25 GB OF RAM
windows XP PRO+SP2

Possibly a power supply issue.
Also, a lot of people are having problems with WinXP SP2. If you didn’t have the problem before, then remove SP2.

That’s all I can say for now.

the problem was with the new nvidia 6.17 driver, gone back to 5.6.55 dont seem to be any problems now…but time will tell.