Hello there, This is a common problem when you upgrade the OS of a PC to a higher OS. The driver for that feature has not been installed on your PC. Often times the previous driver does not support the new OS so the scroll function will not work.
What you need to do is locate the driver for that particular feature which in most PC's are refered to as the synaptics pointing device. Download this from
HP driver support.
When you open the site click on drivers and software then input your model number select from the list the PC which most appropriately describes your unit next select your OS to be windows XP and from the list select "Driver-Keyboard, mouse and input devices" then select "touchpad pointing device driver" and download the software.
After downloading the software right click on it and select properties in the window that pops up select compatibility and when you select that tick on run this program in compatibility mode for from the drop down list select Microsoft windows XP and click apply at the bottom of the page. then click on OK. after doing this install the driver which was downloaded and restart the PC. At this point the problem should be solved and the scroll on the pad should function properly.
Hope this solution has been helpful?
Thank you for visiting FixYa.