How to enable my touchpad

Hi All,

I left my laptop open in my study room recently, and I can tell from the random windows open on it that my cat must have sat on it or walked across it. Now the touchpad doesn't work anymore, though when I plug in an external mouse, that works. Does anyone have any clue how to enable my touchpad again? I tried going to the device manager and right-clicking on "Dell Touchpad," but I didn't see an "enable" option (or a "disable" option, either, for that matter). Any advice would be greatly appreciated.

Specs:

Dell Precision M 4700

Windows 7 Professional SP1

Thanks.