Yes, I did uninstall Norton 360 using that software. I had read about it, and went into the Symantec website and downloaded it and uninstalled Norton 360 using it. So, that can't be the problem. I realize Avast isn't a firewall, and if there are no settings in Avast that could be causing it, then I presume it's Windows Firewall causing it. I will post a question with Microsoft's forum. Thank you for responding.