Hi, For the past several weeks my PC (which is a Dell XPS 430) has shut down during game play, usually after 5-10 minutes. As soon as the game is launched, the fan becomes really noisy and after 5-10 minutes stops, then the PC shuts down. I don't really know much about computers, but I think I can give you a list of specs (Apologies if anything is wrong). Processor: Intel Core 2 Quad Q8200 / 2.33 GHz Graphics Card: ATI Radeon HD 5700 Series Motherboard: Dell G254h (I think) Power Supply: Dell XPS 430 425W One final note, I hoovered out dust from the computer and fan and I could play for a little longer (10-20 minutes) but it still shuts down, just later. I don't know whether that can be a clue as to whats causing my problems. Thanks, - Sam Also, one other thing I forgot to mention. The games I play are games such as Lego Batman 2 and Saints Row the Third. So they are not particularly demanding games.