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Fix 'Port Already in Use' Error with Windows Defender Firewall - How to Get a Windows License for Boot Camp on Mac-How to Fix Windows Activation Proxy Error

Updated 2026-06-13 18:38:32office-tools
Fix 'Port Already in Use' Error with Windows Defender Firewall - How to Get a Windows License for Boot Camp on Mac-How to Fix Windows Activation Proxy Error
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.

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