Vista keeps stealing default status from default printer computer

My home network consists of 3 XP desktops, 3 XP laptops and now a Vista Home
Basic laptop. The "base unit" we'll call it is connected to our HP Officejet
6110 All-In-One and until I had to do a restore on the Vista, all computers
happily shared the printer sans argument. Since the Vista restore, it keeps
sneaking into the printer settings of the XP the printer is attached to and
makes itself the "default" printer randomly. This keeps everyone from
printing until the XP is again reset for the 6110 to be the default printer.
Has anyone else encountered anything like this? HP was of no assistance;
kept blaming Vista. Any solutions?

Thanks all!
e.t.