Computer keeps freezing during pretty much all full screen games.

[Guest]

Right now I am running Vista Home Premium with 2048mb system memory, and AMD
Athlon 64X2 Dual-Core Processor4400+ with resolution set at 1680 x 1050.
However recently whenever I play any full screen game, from Unreal Tournament
2004 - Bejeweled 2 in full screen mode after a few minutes it crashes, with
me not being able to do anything at all. This results in me having to hold
down the power button until it turns off, and then restarting it. Any
suggestions on how to fix this problem will be appreciated.

 

[Guest]

There could be numerous of reasons why this happens, but in most cases it
would have to do with the graphics driver.
But it could also be something set wrong in bios or that your power supply
is to weak, try out installing a newer graphics driver first.
What are your other specs? Motherboard, graphicsboard etc...?