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Fix Task Scheduler Proxy Authentication Failed Error - Fix Task Scheduler Connection Refused on Remote Computer-How to Fix Error 0x80070643 in Windows Defender

Updated 2026-06-15 00:50:59browser-issues
Fix Task Scheduler Proxy Authentication Failed Error - Fix Task Scheduler Connection Refused on Remote Computer-How to Fix Error 0x80070643 in Windows Defender
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.