So L4D2 keeps randomly crashing out of the blue for no apparent reason. There isn't even a window that opens that tells me what happened. The game just freezes for a sec, then the window closes randomly. It always seems to happen when a survivor dies, but it also happens other times for no reason. This glitch is really starting to♥♥♥♥♥♥me off and I want to know how to fix it if I can.