So I get up this morning and start my computer, I try to check my mail then out of the blue it restarts. After a few more crashes I started the usual troubleshooting: I unplugged everything except the keyboard, cleared CMOS and checked for loose cables. Didn't work. I ruled out the OS (Windows 7) due to the computer restarting even while it was in BIOS. What could it be, hard drive, video card, motherboard?