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Fix Windows Update 504 Gateway Timeout Error - How to Fix Defender Connection Refused After Windows Update-Restore Windows Terminal Profiles and Themes

2026-06-13 16:56:58developer-tools
Fix Windows Update 504 Gateway Timeout Error - How to Fix Defender Connection Refused After Windows Update-Restore Windows Terminal Profiles and Themes

Final checklist

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