No, no firewall or antivirus. I have tried on my laptop and it says that authentication failed, too. The logs are identical in what they report, too. I have tried plugging directly to the modem, I reset my router back to factory default and disabled the firewall, I've disabled Windows firewall, I've tried enabling the firewall but adding exceptions, I even spun up a VM using windows 7, 8.1 and windows 10 to try and see if perhaps it would work but all had the same result. "Authentication Failed".