Is a third-party firewall/antivirus blocking the connection? Does disabling NLA fix the connection?
Try entering the remote computer's IP address (e.g., 192.168.1.50 ) instead of its hostname in the Remote Desktop Connection window. Is a third-party firewall/antivirus blocking the connection
If you cannot update certificates and trust the isolated network, use this registry modification . It suppresses extended error 0x7. Is a third-party firewall/antivirus blocking the connection