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Fix Task Scheduler Authentication Failed: Scheduled Task Not Running - Fix Microsoft Teams 504 Gateway Timeout Error-Group Policy Method to Enable Windows Defender Antivirus

2026-06-14 08:18:45browser-issues
Fix Task Scheduler Authentication Failed: Scheduled Task Not Running - Fix Microsoft Teams 504 Gateway Timeout Error-Group Policy Method to Enable Windows Defender Antivirus

Final checklist

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