Yes, wyUpdate support TLS 1.2 only if the system's SChannel version supports TLS 1.2 (wyUpdate uses the .NET framework for the HTTP / TLS infrastructure, which in turn uses native dlls on the system). So, use wyUpdate on a modern version of Windows (i.e. Windows 7 or above) and with an up-to-date .NET framework and it will support the latest TLS standards.