well i got all the parts at newegg.com it's a wholesale computer place where you can buy indivual parts. and all my parts are brand new i just recently hooked it up to the internet about 5 days ago and before that it was doing it too. I got the virus scan and update all my drivers and everything but it still happens. i scanned all the files and there was no virus. And the message that merlin posted is what happens sometimes but my computer just goes right through that and starts up. It will usually say something about the hardware and do you want to start in safe mode or normal mode. i choose normal and everything starts up fine and then later it happens again. i hope this info will help you guys thanks.