My new install of AC3 Windows 8 Pro keeps crashing every ten minutes or so. I think the problem is with some key combinations pressed in the game that bring up some shortcuts even when I'm in the game. I know this since pressing Alt+Tab a couple of minutes in shows the "Immersive background" and "Search settings" menus up on the desktop.

Anyone have any idea how to prevent these shortcuts from executing when in game? I'm not pressing any of the keys except W,A,S,D and the space bar and the two mouse buttons. Thanks!