IF YOU REALLY NEED A TRACK PAD THEN USE 'touchmousepointer'.
TouchMousePointer - virtual touchpad (on-screen mouse)
it puts a track pad on the screen and stays in the task bar for easy access anywhere.
i put the task bar on the right side so when i need to i just tap the icon and use it with my thumb and you don't have to stay on the track pad it. scroll as much as you want, put it where ever you want and make it as big and as transparent as you want. its totaly free and works on 8.1
give it a shot