Welcome to the Seven Forums
Use this link to find your laptop and download the drivers
from their I just went through the process and seen there is a driver
there for the touchpad Download
Something else to look at would be looking in your Mouse Properties under the Wheel tab do you have any settings set up their?
Also while you are in the Mouse Properties under the Device Settings tab click on the Setting button then click on the + sign then click on the One Finger Scrolling and looked to see if you have scrolling enabled.