Been haveing trouble with pc locking up lately . Was told to clean registry but no way do I know what to remove . It all sounds like BS to me . Most recent when plying Battlefield 2142 the game will freeze , lock up , or will minimize to tray and then freeze when clicked to restore . PC is an HP , P4 3.2 Ghz , 2 GB ram , video card is an ATI Radeon X1300 @ 512 MB .Power Supply is 400watt . Should I get a larger power supply? How do I check things , not the best with this stuff I'm a mechanic and good at that need some input on this pc stuff .