I've had my xps15 l502x for 2 years, and in the last month or so it freezes multiple times a day (unresponsive and a buzzing sound comes from the speakers). It's also getting very hot when this happens, pushing 90 degrees Celsius.

I've updated all my drivers and done virus scans but nothing seems to be working. The problem started while I was playing the game starcraft 2, but now it does it all the time. The computer used to run with no problems, now i can't even play games. Any ideas as to what the problem is?