Every now and then the game will freeze, with a black or grey screen. Sound loops. I have to hold down ctrl-alt-del and once I get back to Windows I get an critical Win 10 error message saying the game tried accessing the device video driver or something to that effect. I have 970 with the latest game-ready driver as of this date. But I got this error message even in the earlier driver. Seemingly started to happen after a recent update or a few updates ago. Any suggestions?