So I just got back from college and tried playing on my PC that I haven't played on in about a year. I turned it on, it was loading windows then the screen turned black, looks like it rebooted, now the loading circle is going really laggy (5fps) and after I log into windows it becomes really slow, it shuts off a few minutes after. I've tired un-plugging all my connectors and no luck. It worked fine and fast before I left. I don't think it's overheating because I didn't feel any heat come from the cpu.
My laptop also sometimes has this problem. I'm at a loss to this.
Specs: i5 4690k
8gb ram
gtx 970
win10
