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Fix 'Permission Denied' When Running Scripts in Command Prompt - Setup Guide for Windows Defender Offline Scan-Windows Defender Authentication Failed Error Fix

2026-06-14 04:53:49
Fix 'Permission Denied' When Running Scripts in Command Prompt - Setup Guide for Windows Defender Offline Scan-Windows Defender Authentication Failed Error Fix

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.