So I just bought this used computer, it's a macbook from the late 2007's and it would work fine for the first 10 mins, then it kept freezing. I rebooted the computer but that wasn't working. I then tried to re install the install disk since I hadn't before (10.5 version). The computer turns on but only a wallpaper shows up and no icons or toolbar, you can't right click it either. I took the battery out for a little but nothing happens. Anything I should do?