Hello, This problem can be caused by programs like teamspeak, mumble, AMD Gaming Evolved, open broadcaster, xsplit, fraps ,... (programs that record/drawing in game). Do you have installed new softwares recently? You can also try to (re)install SlimDX . If you can also give me log file of session where wow crash: http://wrobot.eu/forums/topic/1779-how-to-post-your-log-file-with-your-topic/