Remote Desktop Connection Error Code 0x904 Extended Error Code 0x7 ((new)) Jun 2026
Finally, or corrupt network configurations on the client side can generate invalid socket arguments, leading the client to believe the connection attempt is malformed, thus returning WSAEINVAL .
: Windows auto-generates a self-signed certificate for TLS RDP tunnels. If this certificate expires or the local MachineKeys directory becomes corrupted, the handshake fails immediately.
NLA requires the client to authenticate before a full RDP session is created. If the client OS (e.g., Windows 7, older Windows 10 build) or RDP client (Microsoft Remote Desktop for Mac) does not support the NLA version required by the host, error 0x904 + 0x7 appears.
Run date /t and time /t on both client and host. If skewed by >5 minutes, synchronize both to the same NTP server. Finally, or corrupt network configurations on the client
Create a new, empty folder named MachineKeys in that exact path.
Navigate to > Admin Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Security .
Four core technical conditions trigger this precise handshake failure: NLA requires the client to authenticate before a
The Remote Desktop Service ( TermService ) attempts to read the host's RDP self-signed certificate, but access to the Private Key is denied or the key store is corrupt.
To fix this error, it helps to understand what is failing behind the scenes during the initial connection sequence: Technical Layer What Fails During Error 0x904 / 0x7
Fix Remote Desktop Error Code 0x904: 4 Working Solutions If skewed by >5 minutes, synchronize both to
Remote Desktop Connection (RDC) is a feature in Windows that allows users to remotely access and control another computer over a network or the internet. While RDC can be a convenient tool for remote access, users may sometimes encounter errors that prevent them from establishing a connection. Two common error codes that users may encounter are error code 0x904 and extended error code 0x7. In this article, we will explore the possible causes of these error codes and provide step-by-step troubleshooting guides to resolve them.
If you've tried all of these steps and the error persists, the issue may be more specific and requires a different approach.
: A simple reboot of both the client and the remote host can often clear temporary service hangups or network glitches.