The 0x904 error typically appears when you attempt to connect to a remote machine, and the component on the host machine fails to handshake properly with the client machine. Typical Symptoms: The connection starts, then immediately drops.
Select and enter: Rename-Item -path "C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys" -NewName "MachineKeys_old" .
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.
Licensing issues often persist unless the licensing service is reset along with RDP. i remote desktop connection error code 0x904 better
It bypasses SSL certificate validation. While less secure, it’s the only reliable method for older, unpatched embedded systems or legacy industrial PCs.
When you initiate a connection via the Remote Desktop Connection client ( mstsc.exe ), the system completes a multi-stage process: network routing, port negotiation, security certificate authentication, and user verification. A failure in any of these sub-routines can trigger error 0x904. The primary culprits behind this breakdown include:
Security software misidentifying the RDP keep-alive packets as a security threat. Step-by-Step Solutions to Fix Error 0x904 1. Disable and Re-enable Network Level Authentication (NLA) The 0x904 error typically appears when you attempt
The most common cause for error 0x904 is an expired self-signed certificate that the Remote Desktop Service uses for encryption.
: The client and server may fail to agree on a supported cipher suite, especially after updates to Windows 11.
A: This code often accompanies 0x904 and specifically points to authentication problems. It could mean your username or password is incorrect, the user account is locked, or the Remote Desktop licensing on the server has expired or is misconfigured. This error occurs when a client can't establish
Are both computers on the , or are you connecting over the internet ?
. This error is common on Windows 11 and Windows Server 2022. Most Common Fix: Refresh the RDP Certificate