I'd help him directly but he lives very far away. Just recently, as he was away from his PC for some time, it suddenly restarted and live messenger did not work anymore, but from this point on, it randomly restarts, there is no set pattern, might be a few hours to a few seconds. I had adviced for him to clean it, to see if that was it, but the issue persisted, told him to re-seat the RAM, nothing, run with one RAM at a time but it did it again with both, but I doubt both failed. I did tell him to run memtest86 later. I have no idea what it could be.