Try Uninstalling Your HP Software using revouninstaller!http://www.revouninstaller.com/revo_uninstaller_free_download.html
Uninstall you HP Driver through Driver Cleaner 1.5 Pro!http://downloads.guru3d.com/download.php?det=745
Unplug your HP printer &Restart!
If everything works fine after this try download the Latest specific Vista drivers (32/64 bit) and Latest software from vista site & try again!http://welcome.hp.com/country/us/en/support.html
Hope this helps!