AC crash on Windows | windowed mode

[MPx]

well, the title says all. When I use the ALT+TAB to choose the opened windows (for ex, teamspeak) then ac crash showing me that windows, I don't know what does it means with that, because the image file is there.
I'm using windows 8. look at the screenshot.
http://i.imgur.com/nvwqiEu.png

on the screenshot ac crashed when i tried to see the server list. :|