So, noob question- how does the mouse work?

I went into the game and started trying to pick a server and everything, and found that the cursor would not move. then i realized it WAS moving, but not showing it on screen, and I can't sign into a server while it's doing that. Anyone else had a similar problem and/or know how to fix it?

Thanks much, and Merry Christmas

guess, file error.. reinstall, or just ask a dev where are the cursor files and download only them :)