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Microsoft Store Authentication Failed: Quick Fix Checklist - Fix High CPU Usage by MsMpEng.exe (Windows Defender)-Fix Windows Defender Real-Time Protection Greyed Out

Updated 2026-06-13 15:59:42cloud-software

Microsoft Store Authentication Failed: Quick Fix Checklist - Fix High CPU Usage by MsMpEng.exe (Windows Defender)-Fix Windows Defender Real-Time Protection Greyed Out

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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