Q. What does the following error mean: "Windows socket error: Only of usage of each socket address (protocol/network address port) is normally permitted (10048), on API 'bind'"?
It means that yProxy is unable to bind to the Local (Proxy) Port that you have configured. That port is probably already in use. Do you have a another copy of yProxy already running? You can double-click on the yProxy icon in your system tray to bring it up.