Before you first connected the AIO to the new PC did you install the HP
software package including their driver?

http://h10025.www1.hp.com/ewfrf/wc/s...c=en&cc=us&dlc
=en&product=421139&lang=en

HP Full Feature Software and Drivers

03-2007 080.001.237.000 - 163.07M

Download this package and note where it downloads to (do not Install it
from the HP website if this is suggested -- use Save not Run). Then
unplug the AIO cable from the PC; go to the Printers Folder and delete
the printer icon there; go to Control Panel Add/Remove Programs and
uninstall any HP software for the AIO that may show there and then
reboot the PC.

Then with that cable still unplugged from the PC, locate the file you
downloaded -- AIO_CDB_Full_Network_enu.exe (163.07M) -- right mouse
click on it and select Run as Administrator and OK your way out.

That should install it in a way that will work better than just double
clicking on the installation file. Do not connect the USB cable until
the installation procedure tells you to or until you reach Finish.

I suggest you download the Diagnostic Utility there too and have it
installed in case it is needed.

Note that with VISTA Home versions you do not get the VISTA Fax and
Scan function built in. Something may come as part of the HP Full
Feature Software but if not then you will need a third part utility.

Good luck -- let us know how you get on.