Synaptic touchpad became not working after installing SDI (Snoopy Driver).

Some HP and Acer laptops use Synaptics touchpad. After installing SDI (Snoopy Driver) and reboot the unit, the mouse is not working anymore.

e.g. Synaptics SMBus Touchpad

Resolution:
1. Don't install it.
2. Uninstall the device driver under "Device Manager", and reboot the system.