What version of Windows is currently installed?
Also, make sure the driver for the touch screen is installed. You can normally find correct drivers by going on the laptop manufacturers web site and going to their drivers and support section (be sure to choose the correct model of the laptop because many have same name but different variations).
Be sure it's not turned off by some hot key on the keyboard and check device manager to see if it's picking up some sort of input device other than touchpad keyboard.