Alright so I know about the issue with alt tabbing out of fullscreen. I've known about that for a very long time. Today, I tried to play on my laptop for the first time which has Optimus and a GeForce 555M. I play in windowed and a few seconds in to the game, or even as I'm loading after selecting my character, it will crash. It gives me the "Unable to detect Directx device" error as if I had alt tabbed. I find this very odd, as I'm playing windowed. Anyone have insight?