Ok guys/girls/god-knows-whats! Some people might have this bug/error when their cursor disappears! I know something that know one else has posted (that I know of!) So you go to your desktop open the menu (right usually) click "Screen resolution" and make sure that you only have one screen set. I figured this out from trial and error (and because I hoped my account wasn't corrupt)! I hope this fixes your problem and if not try others.
Hope you like this tell me if it works!
Here is a fix from another person! http://gaming.stacke...ll-screen-games (not mine)