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Fix High CPU Usage by MsMpEng.exe (Windows Defender) - Troubleshooting Windows Security Authentication Error 0x80070035-How to Fix Windows Security Dependency Conflict

2026-06-13 14:12:16cloud-software
Fix High CPU Usage by MsMpEng.exe (Windows Defender) - Troubleshooting Windows Security Authentication Error 0x80070035-How to Fix Windows Security Dependency Conflict

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.