I just got this game and for some reason, I can't alt-tab at all. I have to uncheck the option to lock the mouse every time I boot up the game or else I have to quit out if I need to alt-tab. And even if I have the game in a window, it goes full screen when I click instant action and I can't alt-enter to gop back to windowed and I still can't alt-tab. Is there a way to fix that?