Since the W7 laptop flagged HP Update 5.2, I decided to update to the latest drivers dated 07-2009 for my Vista system (previously, it was 03-2007...the "next to latest" version).
Installed fine. Manually ran Hp Update and what do ya know... it downloaded the v5.2, update, restarted and now it is updating the rest of the products. This is the first time it has ever worked on Vista for me across a few different computers.
Grats to HP for spending 2 years on a functional automatic update. With the 03-2007 dated Vista drivers, it never worked and would never update anything and no HP Update download was available to fix it, either.