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How to Fix Windows Defender Proxy Error: Step-by-Step Guide - How to Fix Error 0x80070643 in Windows Defender-Fix 'Port Already Allocated' Error When Microsoft Store Won't Open

Updated 2026-06-13 13:52:06cloud-software
How to Fix Windows Defender Proxy Error: Step-by-Step Guide - How to Fix Error 0x80070643 in Windows Defender-Fix 'Port Already Allocated' Error When Microsoft Store Won't Open
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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