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Microsoft Store Authentication Failed: Quick Fix Checklist - Fix Windows Security Token Expired Error 0x80070520-How to Fix Windows Activation Sync in Dual-Boot with Ubuntu

Updated 2026-06-16 10:11:44developer-tools

Microsoft Store Authentication Failed: Quick Fix Checklist - Fix Windows Security Token Expired Error 0x80070520-How to Fix Windows Activation Sync in Dual-Boot with Ubuntu

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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