This is what I did: Wih the scanner on, go into the
device manager and uninstall the XP driver then install
the HP software. If I remember correctly, you will be
prompted to reboot. After XP loads, a window will pop up
saying that the driver is not digitally signed by MS.
Press the "Continue Anyway" button. I think you are
prompted to reboot again. If you bought the CD from HP,
you didn't have to. I downloaded the newest software from
HP 2 months ago for free and I haven't had a problem. See
if there is a Read Me file on the CD. It might explain it
there also.