Those stutters are because I didn't set the graphics and other settings properly. So I got those stutters. When I first played I got around 18-25fps . If I keep playing without setting the graphics as I mentioned above the FPS gets better and no stutters. And the other thing you mentioned is correct. This is the error message on driver v31.0.101.4032 and most importantly those glitches and weird flashy lines are the problems.