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Fix 'Windows Defender Command Not Found' After Malwarebytes Install - Fix Windows Search Not Indexing External Drives-Fixing Update Failed 0x80070643 in Windows Defender

Updated 2026-06-13 16:02:07developer-tools
Fix 'Windows Defender Command Not Found' After Malwarebytes Install - Fix Windows Search Not Indexing External Drives-Fixing Update Failed 0x80070643 in Windows Defender
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.