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Fix Task Scheduler 'Authentication Failed' Permission Errors - How to Fix Windows Defender Proxy Error on Windows 10-How to Fix Windows Terminal Authentication Failed Error

Updated 2026-06-14 16:40:37developer-tools
Fix Task Scheduler 'Authentication Failed' Permission Errors - How to Fix Windows Defender Proxy Error on Windows 10-How to Fix Windows Terminal Authentication Failed Error
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.