Hi:
I have worked on this problem since summer of last year.
Spent over a month, full-time on it last year, then par-time until now.
I have HP Solution Center working (by luck), but it is not working correctly.
It doesn't allow me to save scanned docs & pics correctly.
It doesn't allow me the selection to do 2-sided printing: it did when working correctly.
HP says the re-install the printer-driver...which is the problem in the first place.
My suggestion is to buy a new printer and forget about this problem/printer.
I purchased an HP 6520/6525 and it works well...but...it has a design flaw.
When you print text or pictures, every 9/16" going down the page it "prints" a white line
... in other words, the ink is missing. I have tried 12 of these printers, from different stores
(Best Buy, Costco, Staples), and they all have the same problem, as do the demo printers in the stores.
The "HP Solution Center" software has a different name for this printer, is much more functional and works well.
I have posted this problem on HP's web page, talked with their hardware engineer, etc.
They don't really believe it is a problem and ask you to ship it to them to be "fixed".
The problem is that their level of acceptance testing of the software/hardware, is not good enough.
If this is a software problem (I believe that it is), they need to issue a new print-driver that corrects it.
if this is a hardware problem (I don't believe so), then they should discontinue the printer, release a good version,
and give folks who have bought a defective printer, a new free replacement.
DaleB