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Fix Windows Update High CPU Usage and Service Not Responding - Troubleshoot Windows Defender Service Failure After Update-Fix Windows Security Threat History Not Clearing

Updated 2026-06-13 14:25:38developer-tools
Fix Windows Update High CPU Usage and Service Not Responding - Troubleshoot Windows Defender Service Failure After Update-Fix Windows Security Threat History Not Clearing
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.