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Fix Windows Update Error: Port Already Allocated - Resolve Cloudflare 521 on Your WordPress Site-Resolve Windows Defender DNS Error 0x800704cf

Updated 2026-06-13 12:49:10ai-tools

Fix Windows Update Error: Port Already Allocated - Resolve Cloudflare 521 on Your WordPress Site-Resolve Windows Defender DNS Error 0x800704cf

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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