For what I would say to be about the past two months I have had a problem which would cause randoms shutdowns, with it sometimes being completely ridiculous; in that it is shutting down every 10-15 minutes. Sometimes it is just a freeze and I just normally reboot, but others I am getting a BSOD. I have two monitors and often it will occur with the left beginning to flash random colors, and sometimes the right will remain functional, with the remainder of instances resulting in the BSOD. The only thing I have tried is to check is my drivers are up to date, all of which are. I am unsure if it could be a graphics card or power issue, and don't have extra parts to troubleshoot these. My build is just over a year old which is why I am confused as to what could be causing this.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic