Originally posted here by whatever878787
ATI driver up to date
Ran AVG but it says that it cannot open C drive.. uninstalled reinstalled still the same (and i reboot everytime i uninstall/install AVG)

i tried event viewer but it doesnt say whats the problem... all i can see is it the startup event no shutdown or error event there
Honestly, I am not even sure this sounds like a software problem to me... it very well be a hardware problem, IE: a failing Hard Drive or power supply.

I would check the most basic things first, such as using a volt meter on your power supply and make sure it is getting proper voltage.

Next step would be to verify that your Hard Drive is not dying a slow and painful death.

Running Memtest couldn't hurt either.