I have an Early 2011 MacBook Pro (13-inch, 2.3 GHz, 4 GB of RAM, Mountain Lion 10.8.2). Sometimes (not that often), my mouse will stop moving when I try to move it, and the keyboard will stop responding entirely. It *partially* works: if I type very slowly and deliberately, it will register the keystrokes. But if I type rapidly like normal, it won't catch all of them. The problem is remedied by performing a multitouch gesture on the trackpad (four-finger swipe down usually works best for me). Is this a hardware issue or software issue, and has anyone else found a more permanent fix?