I might be experiencing the exact same issue. random CTD, mid-game, sometimes without error message and sometimes with memory reference error message. I tried many solutions on the net but it is still happening, my last doubt is Chinese input. One possibility is that when Shift and Alt is pressed (i.e. sprinting and trying to look around), IME is turned on. Occasionally, what I would see is the IME UI popping up when I am in game and accidentally activated IME, and all I need to do is to Shift Alt again to deactivate it.