If the laptop has a key combination (like Fn+F7) to toggle (enable) the touchpad . . . do that and then immediately reboot the computer. Log back in and then try the touchpad. That's essentially what I did with an Acer B117 Travelmate. If I toggle the touchpad off, and don't remember to re-enable it and shut down the laptop, then, when I restart the touchpad will not be recognized (requiring a toogle-in and immediate reboot).