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Fix Windows Defender Missing After Update - Fix Microsoft Store 'Failed to Start' Permission Denied Error-How to Fix Windows Defender DNS Error on Windows 11

Updated 2026-06-13 14:28:36windows-fixes
Fix Windows Defender Missing After Update - Fix Microsoft Store 'Failed to Start' Permission Denied Error-How to Fix Windows Defender DNS Error on Windows 11
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.