Step 3: Check to see if the firewall software is blocking communication
If you cannot access the EWS and are sure both the computer and HP device have active
connections to the same network, the firewall security software might be blocking
communication. Temporarily turn off any firewall security software running on your
computer and then try to access the EWS again. If you can access the EWS, try using
the HP device (for printing).
If you are able to access the EWS and use your HP device with the firewall turned off,
you will need to reconfigure your firewall settings to allow the computer and HP device
to communicate with each other over the network. For more information, see
your firewall to work with HP devices
If you are able to access the EWS, but are still unable to use the HP device even with the
firewall turned off, try enabling the firewall software to recognize the HP device.