What steps can I take to troubleshoot firewall issues preventing printer sharing?

Windows Firewall (or a third-party firewall) might be blocking printer communication. To troubleshoot, temporarily disable the firewall to see if the sharing works. If it does, you'll need to create exceptions for the printer sharing protocol (usually TCP ports 139 and 445) in the firewall settings. Alternatively, ensure the firewall allows inbound and outbound communication for the printer's IP address.