Hulu Causing Computer Lock-Up & Restart

My computer auto restarts or locks-up only when I'm watching Hulu on full screen. I was watching Hulu and paused it for maybe 5 to 10 min while I finished up a couple of things, I starting playing the video and about maybe 10 min later my PC just shut down & restarted, there was no BSOD it just restarted on its own. I dl CPUID to check my temps to see if it was maybe o'heating while i watched other videos on hulu but nothing, it worked like a champ & temps were around 35c I think. Does any one have any suggestions on what would cause my auto restart while watching Hulu.

I ran drivermax and yes those drivers are updated!

yes that happened a few days ago, and while watching hulu about an half hour ago it just froze(locked-up) and i reset the computer.

lol, oops, my bad!

okay ill try that for a little and see what happens, only problem is trying to duplicate the problem, cause it only happens with hulu.