Routing and Remote Access service cannot start: "The supplied kernel information version is invalid"

Question

I'm trying to use my Windows 11 Education 24H2 26100.6584 computer as a VPN server. For this I'm following the usual steps as in previous Windows versions:

• Open ncpa.cpl (Network Connections control panel).
• In the File menu, choose "New incoming connection...".
• Select a user that allows VPN access, click "Next".
• On the "How will people connect?" page, tick the checkbox "Through the Internet".
• Accept the next page with "Allow access".
• Wait for the "Giving access to the people you choose" step to finish.

However, this last step always fails with "Windows could not create your connection. Incoming connections depend on the Routing and Remote Access service, whichw as unable to start. For more information, check the system event log.":

Checking the event log reveals the following information: "The Routing and Remote Access service terminated with the following service-specific error: The supplied kernel information version is invalid.":

It is preceded by a related error: "The currently configured authentication provider failed to load and initialize successfully. The supplied kernel information version is invalid."

While the wizard changed the "Routing and Remote Access" service to start automatically, it always fails to start with the aforementioned error, even after I tried a system restart and an sfc /scannow.

Is this a known issue, is there anything I can do to fix it?
Please let me know if you need further information.

Answer 1

Dear Ray,

Thank you for reaching out to the Microsoft Q&A forum.

The error "The supplied kernel information version is invalid" points directly to a problem with how the Routing and Remote Access service is trying to load its authentication modules.

You could try to Reset the EAP Registry Key to fix this issue:

1. Press Windows + R, type regedit > Enter.
2. In the address bar, copy and paste this path and press Enter:

      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RasMan\PPP\EAP
   

3. Right-click on the EAP folder in the left-hand pane and choose Export. Save this specific key as a backup (e.g., EAP_key_backup.reg) so you can restore it if needed.
4. With the EAP folder still selected, press the Delete key. Confirm the deletion when prompted.
5. Close the Registry Editor then try again.

Disclaimer: Generally, modifying registry subkeys or work group is intended for advanced users, administrators, and IT Professionals. It can help fix some problems, however, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For further protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click How to back up and restore the registry in Windows - Microsoft Support to view the article. 

Please understand that our initial reply may not always immediately resolve the issue. However, with your help and more detailed information, we can work together to find a solution. Thank you for your cooperation.

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