Hello David,
Thank you for posting in Q&A forum.
- Once you are in WinRE, navigate to the "Troubleshoot" option, then select "Advanced Options," and finally choose "Command Prompt." This will open a Command Prompt window.
- the Command Prompt window, type powershell and press Enter. This will launch a PowerShell session within the recovery environment.
- Now, you can run the Test-ComputerSecureChannel command.
I hope the information above is helpful.
If you have any questions or concerns, please feel free to let us know.
Best Regards,
Daisy Zhou
============================================
If the Answer is helpful, please click "Accept Answer" and upvote it.