On the , you can attempt to lower the security requirements via the Registry Editor as a temporary troubleshooting step.
To avoid seeing 0x904 / 0x7 again:
Since 0x904 is a "Socket closed" error, physical network connectivity often plays a starring role. This error usually happens due to an unstable network connection characterized by insufficient bandwidth, high latency, or missing network packets. If you are using a Virtual Private Network (VPN), ensure your VPN is functioning correctly and has a sufficient connection speed, as a slow or unstable VPN link often triggers the 0x904 code.
(Alternatively, use the PowerShell equivalent Restart-Service termserv -Force ). On the , you can attempt to lower
Unlike general credential validation failures, error 0x904 with extended code 0x7 highlights broken multi-transport routing, severe network packet loss, misconfigured Network Level Authentication (NLA), or corrupted secure sockets/certificates on the host server. Technical Breakdown of the Error
Right-click the new MachineKeys folder, select -> Security -> Advanced , and grant Full Control permissions to the local Administrators group and the SYSTEM account.
While the official Microsoft RDP protocol documentation (MS-RDPBCGR) doesn't provide a specific mapping for the 0x904 error code, community research and technical analysis indicate its most common root cause: The connection is interrupted right before or during the essential security handshake between your local client and the remote server. This often manifests as a issue. To better understand what might be causing this, let's categorize the issues and explore how to fix them. If you are using a Virtual Private Network
Press Win + R , type , and hit Enter to open the Local Computer Certificate manager. Navigate to Remote Desktop > Certificates .
If you can access the target machine locally, via a hypervisor console (Hyper-V/VMware), through the Azure Serial Console / Run Command, or via an alternative remote control agent, execute the following troubleshooting methodologies.
Remote Desktop error code 0x904 (extended error 0x7) typically indicates an unstable network connection, expired certificates, or firewall misconfigurations www.remoteaccesspcdesktop.com 1. Renew Expired RDP Certificates Technical Breakdown of the Error Right-click the new
If your VM in Azure returns 0x904:
A: Primarily, yes. However, third-party RDP clients (like FreeRDP, Remmina) can also return "0x904" when they fail to read the server's security response correctly. Alternative RDP tools (MobaXterm, RoyalTS) often bypass the specific client-side winsock implementation that triggers this error in mstsc.exe . Moreover, virtualization tools like RustDesk and Dockur have documented issues where they improperly handle RDP handshakes, causing this exact error code.
: Hostname resolution issues, especially in Windows 11, can trigger this error. Try connecting directly via the server's IP address (e.g., 192.168.1.100 ).
**Gateway Maintenance (