My computer will restart/go inbto stand-by mode whenever I start a game. EVERYTHING ELSE works PERFECT, but not computer games(call of duty 2, diablo 2:LOD, half-life 2, counter-strike:source, and guild wars are the games that have been tried). I have replaced my motherboard, video card, cpu, 450 watt power supply, 1gb of ram, and 2 120gb hard drives. It all started before I replaced my motherboard and cpu, but after I got new stuff its still going on. I have the latest drivers for all my things. Please, if anyone knows whats going on, tell me. Thanks.