On my desktop it did the same... and My graphics card is an ATI Radeon 9600.. Old Skool!

I started silkroad, then bam! computer restart... suddenly i smelled burning metal... i immediately shut my computer down.. checks the supply, boiling hot, opened it and it was full of dust... haha... well thats what I get for not taking care of my computer, anyways I went to buy a new power supply, and now it works fine, while running other apps too..
If you do not have the time to go buy a new one, I suggest Ctrl + Alt + Delete have a look under "processes" and check anything that you think you do not need, and if your not sure about a program google it... that might be a solution, because, without knowing it your computer opens up many programs...

Hope it helps...
