I built a new pc, and I've started having a few problems. 1) When doing a reboot from inside windows, the pc freezes at POST. Doing a cold boot or rebooting after this problem happens doesnt cause it to happen. I think it started when I left a usb drive plugged in. 2) I was thinking it might be a memory problem (2gb corsair), but memtest freezes. The memtest "+" thing still flashes, but the time and test progress just stop. Pressing escape to reboot doesnt help. I've tried everything I know, resetting bios, loading failsafe defaults, testing 1 stick of ram at a time, still no luck.