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How to Fix Firefox Secure Connection Failed Error - Windows Terminal 404 Error When Opening Command Prompt-Troubleshooting Windows Defender Authentication Error

Updated 2026-06-13 18:43:56developer-tools
How to Fix Firefox Secure Connection Failed Error - Windows Terminal 404 Error When Opening Command Prompt-Troubleshooting Windows Defender Authentication Error
Prepare
Execute
Validate
Document

Operational follow-up

  • Record the exact option, command, or setting that changed the result.
  • Keep a rollback note if the workflow affects shared files or team settings.

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