Ed,
I answered your post to Richard before I saw this one.
I have a 2.5 year old Gateway FX510 desktop. It came with XP Media Center
Edition. 13 months ago I did an upgrade to Vista Home Premium. I tried to
reinstall the HP Director software, only to discover it would not run, and
then found that HP didn't have an updated version. However the printer
works fine for me using the Vista drivers.
Since Home Premium doesn't come with Windows Fax & Scan, I purchased VueScan
for my scanning needs. I don't fax much, so I can do that manually.
I don't recall doing anything special to get it to work.... it just worked.
I have it plugged into a D-Link 7 port hub (powered). I share this printer,
and my wife prints to it, using her laptop (also with Vista Home Prem.).
Last month's Windows Update (2/15) did something to my computer, and I
ended up doing a clean install of Vista. The printer was recognized and set
up correctly, automatically. I don't recall doing any setup to it, other
than sharing it.
I would unplug it, remove it from Printers, reboot, and plug it back in.
You might try other USB ports.