My 5 year old is rather the pc wiz and he has his own computer that has games and such on it for him. What I need help with is his cursor will only move up and down in the middle of his screen and I don't know how he did that and what to do to fix it. This is the 2nd pc that he has done this to, is it a setting that he played with that he shouldn't have. Can someone please help me fix it for him.