well it started when i was having problems where if i installed my video drivers windows would not load but it would in safe mode only (vista sp1) then i went and tried updating and installing sp2 the update completely screwed up and now it wont load at all so i installed on to a new hd installing xp first then using my upgrade to vista and it freezes within the first 5 mins after startup and like ive said i tried a differend vid card, ran diagnostics on memory and the hard drive all checked out. the system is custom built. 2.2 core 2 duo, 4 gig gskill ram, 500gb seagate sata hd, 8800 gts geforce video card with windows vista sp1