So my computer just shuts down like you pulled the plug from the wall. There is no worning at all. Just shuts off and then restarts. when it takes me to the web site that tells me what went wrong it says "stop error" and "system had and error and had to restart" or something like that. when it happens again i will save the page. This is a custom computer i built. So far i have gotten a new power supply(600w), i pluged it in to a battery back up, i replaced my video card, and a new hard drive. So if some one could help me because everyone i know is stumped.