Scroll sections on mousepad not working

It's not working because it's either not enabled in your control panel any more, or the driver that allows the scrollbars to be used is not installed. This will happen if you've formatted your computer, or tried uninstalling software you didn't think you needed.

All you have to do is go to Compaq's website, enter the serial number of your computer in the search box, and you should find a Drivers and Downloads type section that will contain a list of all the drivers your computer needs, including the one for your mousepad.