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Fix 'Windows Security Cannot Connect to Microsoft Defender' Error - Resolve OneDrive Sync Pending Issue Post Windows Update-Fix Windows Search Indexer Not Working

Updated 2026-06-13 16:06:40developer-tools
Fix 'Windows Security Cannot Connect to Microsoft Defender' Error - Resolve OneDrive Sync Pending Issue Post Windows Update-Fix Windows Search Indexer Not Working
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.