Click "Allow another app," browse to C:\Windows\System32\mstsc.exe , and add it to the list. 3. Resolve Network or VPN Instability
The error often appears because the HKEY_CLASSES_ROOT\RDP keys are missing. This is common after using registry cleaners like CCleaner. i remote desktop connection error code 0x904 install
Use Azure Portal's Run command to rename C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys to MachineKeys_old , then reboot the server. Quick Troubleshooting Workarounds Click "Allow another app
Reboot the server. This forces the system to recreate the necessary key folders. 3. Verify Firewall and Security Settings " browse to C:\Windows\System32\mstsc.exe