You could, as hamluis suggested, reinstall the HP software.
Then instead of using Add Remove Programs to uninstall
Download and install free version of Revo Uninstaller
. After installation open Revo. Click on HP to start the removal process.
For best results, use Advanced
. If successful, and asked for a reboot, say no
Then click Next to begin looking for leftover items. Check only the bold entries.
To make sure you get everything, if any entries-usually the last thing listed and not in bold-have a + sign click on the + until you see more bolded items. Check those items to delete. Click next and let it find files you can safely delete.
If a reboot was required, do so after deleting files and folders.