Windows 7 – HP Multifunction Printer problems
If you have a HP multifunction printer with its “Full Feature Software solution” or “Basic Driver solution” installed then, after upgrading to Windows 7, you may find the printer stops working.
Press the buttons on the front of the printer and nothing will happen; launch the software manually and you’ll see reports that it can’t connect to your hardware.
The problem is that a few files and Registry entries have been lost in the migration to Windows Vista, and even reinstalling the original HP software will not help.
There is new version of HP Solution Center that should get everything working, you can find out more about it at the HP Support site