Does anyone know why a cursor would jump all over the screen? I will be typing and I will look up and find I have been typing in the middle of another line for the last couple of words. Or if it is a e mail, I will look up and find the cursor has jumped to the address line. This really annoying as I have to back off what is where it shouldn't be and then reprint in the right place

   If it is a laptop and has a touchpad for the mouse, you could be touching the touchpad while you are typing and causing the cursor to move.
   If you have a mouse, I would suspect a bad mouse.