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Fix High CPU Usage by MsMpEng.exe (Windows Defender) - PowerShell Invoke-WebRequest 404 Not Found Fix-Fix Microsoft Store 404 Error on Windows 11

2026-06-13 17:27:13windows-fixes
Fix High CPU Usage by MsMpEng.exe (Windows Defender) - PowerShell Invoke-WebRequest 404 Not Found Fix-Fix Microsoft Store 404 Error on Windows 11

Final checklist

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