Try installing the XP version software using Compatibility mode set to
XP with SP2 and Run as Administrator?
If it's USB connected remember you must disconnect the USB cable from
the PC and the printer and turn off the printer before starting to
install the HP software.
Check that there is no HP software for the scanner installed already;
if there is uninstall it and delete the scanner from the Control Panel
/ Scanner folder and reboot -- without that cable connected!
You might have to go into Services and disable Windows Image
Acquisition (WIA) but I have a much older HP SJ5P scanner working using
the TWAIN conection.
If this works you may find that the scanner does not appear in the Fax
& Scan module but will work using the HP software.
If this does not work and you really want to try something, uninstall
the HP software that did not work and clean up as I indicated earlier.
Download the HP Deskscan 2.9 software sj166en.exe 1/1 (4.65M) from:
http://h10025.www1.hp.com/ewfrf/wc/genericSoftwareDownloadIndex?
cc=us&dlc=en&lc=en&softwareitem=sj-34132-1&jumpid=reg_R1002_USEN
and run that as before using compatibility mode and run as
administrator.
This is the HP scanning software before Precisionscan came out and we
often recommended it over the later software. It's what I've been using
under W2K, XP and now under VISTA. It works fine including the neat
copy utility.
Let us know how you get on.