This solution is designed to handle mismatched security protocols and is a direct fix when the error appears after an OS upgrade.
To resolve the Remote Desktop Connection error code 0x904 extended error code 0x7 full, follow these step-by-step troubleshooting guides:
Upgrading to newer operating systems (such as Windows 11 or Windows Server 2022) introduces stricter encryption standards. If the client and host cannot agree on mutually supported Network Level Authentication (NLA) rules, code 0x904 is thrown. This solution is designed to handle mismatched security
folder might be corrupt, preventing certificate generation. Renaming the folder C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys MachineKeys_old and rebooting can fix this. www.remoteaccesspcdesktop.com Alternative Workarounds Microsoft Store App Remote Desktop app
Navigate to > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Security . folder might be corrupt, preventing certificate generation
Error code with extended error 0x7 occurs when a Remote Desktop (RDP) client fails to establish a session because the client cannot retrieve or validate the remote machine’s user or session information. This usually indicates a connection or authentication failure between the RDP client and the Remote Desktop Gateway, broker, or host.
Avoid Wi-Fi if possible to reduce packet loss. Check Firewalls: Ensure port 3389 is open. Summary Table Target Issue Manage Key Permissions Give Network Service access to RDP cert Certificate/Private Key Issue winmgmt /salvage Repair WMI database Corrupted WMI Repo Set Policy to RDP Change encryption negotiation TLS/Protocol Incompatibility Conclusion Error code with extended error 0x7 occurs when
: The Remote Desktop Service ( TermService ) attempts to establish a secure Transport Layer Security (TLS) tunnel but gets denied access because the host’s self-signed certificate is corrupt, missing, or expired.
Restart Remote Desktop Services via Command Prompt (Admin) by running: restart-service termserv -force