LIGHTSAIL - Network Unavailable

We can't access one of our Windows Lightsail instance, seems like the network was unavailable or not functioning inside the Windows O.S. (drivers ?). We don't change firewall or network settings in the Lightsail panel. How can we access our instance if there is no network connection available? Tried to reboot, Stop and start, and no solution available. The instance is HEALTHY , the issue is NO network inside Windows OS.