Greetings, all. I have a Macbook Pro that is about 5 years old. It has developed a problem with the cursor not responding to direction from the trackpad. Here are the symptoms: The cursor does not follow the movement of the finger on the trackpad, but it does move. It jumps around the screen and occasionally causes right-click menus to pop up or other pages or functions to pop up. The cursor continues to move for a while after I have stopped touching the trackpad. The cursor is either getting instructions elsewhere or is having a delayed response to directions I gave it earlier. Or some other cause that I haven't thought of. I have restarted the computer numerous times, and the problem clears up for a little while. But before very long, it starts up again. This leads me to believe that it is not a problem with the trackpad, since it will work sometimes. Perhaps some other program is interfering with it? I have cleaned the trackpad and keyboard with an air duster and a cotton ball with a tiny bit of alcohol on it. Didn't help. I would be grateful for any direction in this matter.