I have no personal experience with that firewall, but I'd definitely uninstall it. You could always install it again to see if it was an aberration. Many here will suggest using the windows firewall, with the
windows firewall control. I use the Comodo firewall, with the defense plus. I don't use the AV part. Even if Private Firewall is a good product, if it doesn't work for you, it's not. A Guy