So I have been using my laptop (Fujitsu) just like any other day and when I open any game my cpu just overheats and my fps drops by 75%. I have had no problems with my CPU before. I have installed some software to check the CPU's temperature and both cores are at 80°C when nothing is happening. When I restart my laptop, I can use it normaly just until I open a game. When I open a game the laptop starts working really badly and when I leave the game the keyboard stops working, I believe due to CPU overheating. My laptop has 8gb of ram, GT640M GPU, Intel i3 3110M CPU. Like I said previously I have never had any problems running even games like GTA5 so the PC specs aren't a problem I guess. Any ideas of what would be the problem and how to fix it?