Disable Firewall Software
As good as Disabling Firewall Software it protects from threats from outside, but eventually it can block the network communication of your printer. Simply, disable the Firewall software by using the HP Print & Scan Doctor to clear out the HP Envy 4504 printer not detected or not found. Select the desired network from the HP Print & Scan Doctor >pick the troubleshooting firewall> Disable the status. Wait for the successful installation to get the support from the firewall software that permits the security levels, & trusted zone and allows the HP Software & Website interactions.