I am a registered user of both Port Explorer and TDS 3. The system is a standalone XP Home version behind a Norton IS (NIS) firewall. When I run the Local Port Scan utility of TDS 3, it finds TCP ports (2281, 2282, 3566, 3567, 4882) that are in use by something but these ports aren't showing up in Port Explorer. Is this a bug in the TDS Port Scan and the ports are not in use, or is it a bug in the Port Explorer which allows an undocumented open port? A full system scan by TDS shows nothing suspicous. Likewise scans with Norton AV and AVG by Grisoft and Adaware also detect nothing.