Ive noticed now that when I press CTRL ALT DEL (as this is the only way I can stop the game and return to the desktop)

That the window which comes up showing what is running briefly appears on top of the window in which the game is running and its HUGE (so me changing the resolution on the desktop isnt affecting the game)
Could this be an issue? Is there a way I can hange the resolution for the game, becuase I cant access the options tab on the main menu for the game can I due to the distorted graphics

Also when I bring up CTRL ALT DEL the game is the only thing running yet my PC is running at 100% is this right?