So back during summer I built a computer. I couldn't get it to run until a couple weeks ago. Something was just plugged in wrong and I didn't have the time to look at it. I recently have had a problem with the computer though. When I'm just on the internet browser or something else the computer will restart after a few hours. The computer screen will turn black when I'm running games like Watch Dogs, which is a high graphic game. There is no error that pops up on the screen when it turns black. It's literally just a black screen.I noticed the last time the screen turned black after playing a game there was an A and 2 at the bottom right, if that means anything. I looked at event viewer on the computer and it said "Kernal 41 Error". I don't really remember all the computer parts, and don't have the tools installed on the computer, so if you guys could supply some links to the tools I'll gladly use them so you can see the parts inside my computer.