The game exits sometimes when I am playing.
 

It's like BAM... back to desktop and I have to go in again.

I am assuming its my power supply as it is 4 years old but give me other things it could be.

if your computer is still running, and this only happens when playing a game, it aint your power supply.

Is the game a legit version? or burned copy?

Some of the burned games I have will randomly exit...I think its something to do with the cracked game exe file.

If the game is legit, check the developers website for any patches/version updates or known hardware conflicts.

Nah, its legit.

Im already patched up though.

Never happened before though.

wtf

It kicked me out and when i tried to go back, it gave me this message.

No 3d video card found or low video driver version. Please install the latest video card driver.

Thats BS though because I have the latest driver and everything else works fine.

try reinstalling the game, when you do, choose a different install path than whatever the games default is.

IE: c:\programs files\id software\doom3

change it to something different all together.