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Fix Chrome ERR_TUNNEL_CONNECTION_FAILED on Windows 10 - Windows Defender Permission Denied: Scan Folder Fix-Troubleshoot Windows Defender Version Mismatch

Updated 2026-06-13 13:10:10office-tools
Fix Chrome ERR_TUNNEL_CONNECTION_FAILED on Windows 10 - Windows Defender Permission Denied: Scan Folder Fix-Troubleshoot Windows Defender Version Mismatch
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.

More repair notes

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