I Remote Desktop Connection Error Code 0x904 Better 【2025-2027】

This error occurs when a client can't establish or maintain a connection with a remote host. While it can block any RDP client, many specific cases involve users who can't connect from a new Windows 11 device, even though older Windows 10 clients connect to the same host without any problems. This article is a comprehensive guide to understanding and fixing error 0x904.

Did this error start occurring after a recent or antivirus installation ? Share public link

(Solutions can vary slightly for ⁠Azure VMs .) i remote desktop connection error code 0x904 better

Access the VM via the Azure Portal and use the feature to execute the following PowerShell script: Rename-Item -path "C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys" -NewName "MachineKeys_old" .

Group Policy on client:

In many cases, a simple restart of the remote computer resolves the issue, as it forces the system to regenerate temporary authentication keys.

Incorrect port assignments in the Windows Registry can prevent successful handshakes. Press Win + R . Type regedit . Press . This error occurs when a client can't establish

Use the tool in the Azure Portal to run this PowerShell script: Rename-Item -path "C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys" -NewName "MachineKeys_old" Reboot the server. 4. Adjust Security & Encryption Layers

Unstable Wi-Fi or internet routing drops the connection. Did this error start occurring after a recent

Uncheck the box that says . Click OK and restart the machine. 2. Configure Windows Defender Firewall Rules