I just built a new PC running win 7 ultimate 64 bit and I installed CK2 and it runs great save one issue. It will not let me change the resolution it. I cannot even change it in the settings file in my documents. The only way I can change it is to change my desktop resolution and CK2 will do whatever resolution I set there. Before on my old computer I could just change the resolution in the graphics options in game. Now those arrows in game are grayed out.