What firewall settings might be blocking access to the shared printer?

Windows Firewall (or third-party firewalls) might be blocking communication. Ensure that the firewall allows traffic to and from the printer's IP address or the printer share. You might need to create inbound and outbound rules specifically for the printer's port (typically TCP ports 135, 139, and 445). Temporarily disabling the firewall (for testing purposes only) can help diagnose if the firewall is the culprit.