It worked perfectly before it upgraded before I installed 8.1
dx11.1/2 might be putting a heavier burden on your CPU (although I thought it was supposed to do the opposite)
the point is BF4 should not be able to shut your PC down, regardless of bugs, win8, or whatever. that would most likely be your CPU overheating, or something with your PSU
It worked perfectly before it upgraded before I installed 8.1




