I'm using a ASRock and using the onboard intel graphics chipset
In the past two weeks, I've had three instances where my new computer build (I built it around November/December time) where it has completely locked up and the screen, purple and green squares appear all over. It usually happens when I am watching a youtube video or playing a game (Not intensive 3D games, 2D games). The onscreen artifacting suggests to me there might either be a hardware error or driver error (I cannot find driver downloads for my chipset so I dare not uninstall the ones I've got.) This issue never happened while I was using Linux mint (I have only just installed windows 7).

I also had a blue screen error on one of the lockups:
0x0000003b (0x00000000c0000005, 0xfffff960002ad753, 0xfffff88007350da0, 0x0000000000000000)

Also, this is an issue I've had with my front usb ports, they stop working sometimes (happened in both OSes).

Here are my specs: