Now when I try to use my secondary screen which is an old Samsung one, it just says "not optimum mode, optimum mode is..." and then the resolution and hz. Thing is, it is already set to that resolution and the right hz. Left 4 Dead 2 is like a virus that really seems to **** up computers. Every computer I've ever used to run it, eventually took a big fat clubbing from the game such as broke graphics card, broke drivers, made the computer reboot frequently, bluescreen, etc. Anyways, anyone know how to fix that bloody "Not optimum mode" screen that is a little box on my secondary screen? It simply won't show the desktop no matter how hard I try.