It's very odd and I can't figure out what's going on. I'll be playing CoD4 and the computer will suddenly shut down completely. It's not going to sleep, this is a hard shut down. I'll have to leave the computer unplugged for 15-30 minutes before it will restart. This is a new trick, it just started this past week. I've been playing on line for more then a month without a problem. It doesn't happen when I run any other software. What I found: It ONLY happens when I'm playing CoD4. There is nothing in the console logs that would indicate why it shut down. It doesn't go down when I start the game, I'll get to play for 10 minutes or so before it shuts down. What I tried: I tried swapping out joysticks thinking maybe it was a hardware problem. I tried zapping the Pram I threw out all the 3'rd party and custom maps. The only thing I can think of is maybe it's a PunkBuster issue. The week before all this started, I suddenly had to manually upload an update. I never had to do this before, so I downloaded a fresh updater as well. This is the only thing that's changed in the past 2 weeks so I'm leaning toward this being somehow related to the problem. Anybody got any ideas?