0x7 ((full)) — Remote Desktop Connection Error Code 0x904 Extended Error Code

Windows Defender or third-party antivirus software (like Bitdefender) blocking mstsc.exe or RDP traffic.

“Remote Desktop Connection cannot verify the identity of the remote computer. Do you want to connect anyway?” Followed by: “An authentication error has occurred. The function requested is not supported. Remote computer: [IP or hostname]. Error code: 0x904. Extended error code: 0x7.” high packet loss

Insufficient bandwidth, high packet loss, or a sluggish VPN connection. high packet loss

HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server DWORD: fDenyTSConnections = 0 (to allow RDP) DWORD: AllowRemoteRPC = 1 high packet loss

Open gpedit.msc → Computer Configuration → Admin Templates → Windows Components → Remote Desktop Services → Remote Desktop Session Host → Security → → Set to Negotiate or RDP .