After an unexpected shutdown of my Toshiba Laptop, running Windows 7, the cursor became frozen to the center of the screen. This made it difficult to type in certain things, like web addresses. I checked repeatedly to see that I had not clicked the mousepad lock key, and that does not appear to be the case. I have been able to move the cursor using a wireless mouse, but I would like to have the laptop mouse pad working if at all possible. Is there some sort of driver I need to download?