"printer is offline" appears on one computer but not the other (both windows 7)

printer is offline" appears on one computer but not the other (both windows 7)

This is pretty common to see when your firewall kicks in and blocks certain communication paths the printer takes.
Here's a list of ports and programs that when allowed through the firewall, will restore communiction.
Ports to open:
UDP ports: 427, 161, 139
TCP ports: 9200, 9220, 9290, 9500
Programs to allow:
hpiscnapp.exe
hpoews01.exe
hpofxm08.exe
hposfx08.exe
hposid01.exe
hpqkygrp.exe
hpqste08.exe
hpqtra08.exe
hpznui01.exe
hpzwiz01.exe
SLP_Service (also known as UDP 427)
Have your security software provider walk you through allowing these items through your firewall.
If this does not fix your issue, it is most likely an issue with the driver configuration. Your router may have assisgned the printer a new IP address and this can be changed in the properties of the existing driver.

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