I just bought an MSI gaming laptop i7 6870 nvidia 1070 16g ram 1tb ssd. Whenever I am playing any game that is remotely graphics intensive it freezes my screen and won't allow me to alt tab or use the task manager after I open it up. It is not uniform either. It randomly crashes. Sometimes it takes 5 minutes sometimes it takes 30 minutes. I just bought my laptop yesterday so I know it is impossible for it to be any virus or other conflicting software issue. I also used DDU and reinstalled the most up to date driver and nothing changed. I also used msi afterburner and the graphics card and the cpu are normal temps for the crashes. Also if it helps for XCOM 2 it always freezes with a black screen when it loads a new sect of the game, e.g starting a mission or something and I can still here the sound but it will never unfreeze.