Ok, here's the deal. Computer was randomly shutting down. Did some research and seems to be with most forums and info that it's overheating or power supply issue. Fixed it, was a poor job on the paste on the CPU. last time i'll buy a pre-built. The problem: While I was figuring my computer out, I decided to upgrade my wifes a little. I have dual Nvidia 9800 GT's and I gave her one of them, switched out her ATI 4350. Installed the drivers and used driver sweeper to make sure the ATI was gone. Now all of a sudden her computer is suddenly shutting off. So I figured, well maybe it was my graphics card, so i took mine back out and put hers back in. and reinstalled drivers and sweeped it. it's still doing it. I find it odd that mine was doing it, I took a piece out of mine and put it in hers, and now hers is doing it. and mines working again (with that 9800 GT back in) and the other computer still isnt working. any ideas?