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Fix Task Scheduler Proxy Authentication Failed Error - Windows Defender Real-Time Protection Not Responding-Fix Windows Security Service Configuration Error

2026-06-13 20:25:19windows-fixes
Fix Task Scheduler Proxy Authentication Failed Error - Windows Defender Real-Time Protection Not Responding-Fix Windows Security Service Configuration Error

Final checklist

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