I'm trying to diagnose a friends computer so I came here because there are a lot of very knowledgeable people here that have provided me with help in the past. Anyways, his computer will randomly restart every 10 minutes or so and can be playing a game or just sitting idle. The computer was recently reformatted so their isn't a whole lot of software on the hdd. I also recently reseated the GPU fan/heatsink on his 7800gs which helped the temps out which are sitting right around 58 C. I checked the CPU temps and they are sitting at about 58 C also. There are no overclocks on the card so its not locking up because of that. Any other suggestions. I know that this can be a pretty vague subject to diagnose, but does anyone have any suggestions on where to start?