Hi!

I had a visual problem. The cusor was "blinking" and going small when moving the mouse (the same size as my cursor for windows) and becoming big after I stopped moving the mouse. This was quite annoying, but then I read another post about controller and realise I had a xbox 360 controller connected. I think that it's because the cursor for the mouse and the cursor for the the controller are not the same size and change back beetween them when moving and not moving the mouse and the game try to use the controller by default or something like that.

Anyway, I unplugged the xbox 360 controller and it solved the issue. Hope it helps other peoples here.