We have been having offline issues with this same printer. I have tried to install all new software to a Win 7 64 bit computer but the full software cannot complete. It detects the printer on the network, goes through the network settings but when it gets to Installing Your Printer, it fails with this statement: 'Printer setup has failed to complete. Click retry to try installing the printer again or click next to continue installation without connecting to the printer now.'
Now, I am connected via the web to the printer and all is well on the status screen. I have updated the firmware too. I read through many blogs of others having the same issue with no real resolution. All those that were connected to it are now showing 'offline' even though they can ping it and access it directly on the web - but none can print. I have tried downloading and installing the HP Print and Scan Doctor but it needs the 'full' software installed in order to run.....but the full software cannot complete it's install because of the above.
I have always loved HP printers but this one deserves to be in the land fill!