It looks as if the network setup on the PC may not be configured correctly to 'talk' to the printer.
Starts to get a bit more technical but here goes....
If you have printed out a configuration page manually from the Printer as per my previous post, take a look at how the wifi is configured. e.g. SSID, Security type (WEP,WPA etc), Network IP Address, Default Gateway. Do they sort of match the diagnostic report?
If you are successfully connected to the Internet on the PC, the next thing is to try 'talking' to the printer via your Web Browser. To do this take a note of the Network IP address number shown on the Printer configuration printout page, for example something like 192.168.0.100.
In your browser address bar enter
HTTP://192.168.0.100 (but use whatever the Network address is that you found on the printout page). Doing this will at least prove if the printer is actually 'there' on the same wifi network as your PC!
If it responds, the next thing to try is to switch off your PC Firewall as per my last post.
If this does not work, I think you should next try to connect the printer to your PC via a USB cable and let the system create a new printer queue that will configure automatically for the USB port. Test that it will print via Windows.
If that works you can then convert the USB port to use a WiFI connection.
To this there is some more instructions on the HP site at:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02900814&lc=en&cc=us&dlc=en&product=5063582
See the section 'Step Two - Prepare for installation.'