Configure Windows Terminal to Trust a Self-Signed Certificate - How to Fix 'Product Key Not Accepted' During Windows 11 Setup-Fix Windows Defender Real-Time Protection Authentication Failed

Updated 2026-06-13 21:54:08windows-fixes
Configure Windows Terminal to Trust a Self-Signed Certificate - How to Fix 'Product Key Not Accepted' During Windows 11 Setup-Fix Windows Defender Real-Time Protection Authentication Failed
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.