Any ideas to fix this problem? I press shutdown in start menu in windows XP pro and it sometimes shutsdown and other times it reboots. I have a LGA775 Prescott 640 chip with a DFI Lanparty 925X-T2 mother board. I have Corsair 1 GB of XMS 2 TWIN2X 667MHz. I have a NEC dvd burner and a WD 74GB raptor harddrive. My video card is a BFG 6800GT OC. I've tried so many things nothing has worked any help would be great!