So I have had this PC for about 3 years now and this has been a problem since a few months after I first bought it. Sometimes it could go weeks or even months without happening. Usually only happens while I am playing games. It will stay frozen until I turn it off by the power switch on the back. I have a GTX 1080 and a i7 6700k. If you need anymore of my specs then I will post them. Anybody know what the problem could be?