With any of my characters on any difficulty lvl, whenever I start act2 and start going through the Sundered Canyon. After the attack on the iron wolves in the entrance of the canyon. I can walk a few steps further into the canyon, and all of a sudden I'm back in Windows. D3 has completely shutdown. No error messages or lag, or a delay in the game shutdown.I walk a couple of steps and I'm instantly back in windows. I have several characters that can't progress until this gets fixed... Help?