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Fix Firefox Not Responding After Update: Practical Steps - How to Resolve npm Permission Denied and ENOENT-How to Fix WSUS Authentication Failure

2026-06-13 13:24:24windows-fixes
Fix Firefox Not Responding After Update: Practical Steps - How to Resolve npm Permission Denied and ENOENT-How to Fix WSUS Authentication Failure

Final checklist

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