The touchpad works. Tapping on touchpad doesn't. the hardware buttons (not sure what they are ) however if it means left and right clicking using the touchpad that works fine. Just can no longer tap to click using touchpad.
Well, you probably have Synaptics touchpad, and if you have installed software of it you can check the settings (usually you can find running application in tray).
Also you can download fresh drivers from here. http/www.synaptics.com/en/drivers.php
but again, check firstly is it synaptics or not (go to device manager and find ps/2 pointing device (name can be different) under mice and other pointing devices or under Human Interface Devices and check Manufacturer on Details Tab).