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0x904 Install | I Remote Desktop Connection Error Code

The most common fix is ensuring you are not logged into the remote computer elsewhere.

When attempting to install an update, patch, or feature related to Remote Desktop Connection (mstsc.exe) or when an RDP session initialization triggers an automatic component installation, the system returns: i remote desktop connection error code 0x904 install

If you cannot change the server certificate (e.g., connecting to a legacy machine), you must tell the client to ignore the error. The most common fix is ensuring you are


  • If the problem is specific to Remote Desktop Protocol features on Windows Server, verify licensing/enrollment and RDS role services are installed correctly; consider removing and re‑adding the RDS role.