I recently purchased Crysis 2 for my system. It runs fine on my machine on ultra in Dx9. But when I switched it to DX11 my LCDTV which I am using at a monitor flips out and sets my resolution back to 800 x 600 and moves the screen so I can't really use my mouse (I was barely able to readjust it back to DX11). If it helps my systems specs are

i5 2500k
8gb ram
HIS 6950 gb