Same configuration on Windows 7 and Mac computers side by side, same LAN. Mac works, Windows register at startup times out. Have also uninstalled and reinstalled. Suggestions?
If both computers are connected to the same network, you should check your Windows Firewall and Antivirus. They might be blocking Zoiper.
You can also try following some of the advises in our troubleshooting article, here: https://www.zoiper.com/en/support/home/article/19/Error_408_Request_Timeout