It freeze when I move my mouse

Hi guys, playing here since tbc out, never expect any prob, since few days when I move my mouse my screen freeze (lag) If I don't move it, there no lag, if I move it, right to left or anywhere it will lag until I stop

for some reason if I put to windowmode, I got no lag, no lag from moving my mouse, just like before..I come back to fullscreen, than when I move again my mouse I lag....... How it possible?

Hope someone know something about this

Thanks alot

I got the same problem. When I move my mouse around in circles, there is a full freeze.