So this is a problem I've heard many people had, but I've never read the cause of this. The mouse is not responding in VC/LC. Sometimes you can fix it by mashing Esc(enter->exit menu), the mouse will sometimes respond after a while.
I believe there must be a definite cause of the problem, because I didn't have it a few months ago, but when I entered VC today it was back (I've had it before).
Help would be greatly appreciated