Go into Device Manager. Find the touchpad and right click on it. Uninstall the device and remove the drivers (when asked). Restart the system, enter the BIOS and disable the touchpad if you can. Save the BIOS settings and restart the computer with the mouse attached. Allow the system to fully boot up.
Then, restart and go into the BIOS. Enable the touchpad. Save the BIOS settings and restart the system. Windows will detect the "new" device and reload drivers for the touchpad. That should solve the issue if there is a software problem.