No Windows Security after upgrading to Windows 11

My laptop desktop under Windows 11

This weekend I upgraded my Acer Nitro 5 laptop from Windows 10 Home to Windows 11 Home.

It mostly went well.

Microsoft Security was missing!

A strange consequence of the upgrade in fact was that most of my Modern Windows Apps were missing and needed to be reinstalled from the Microsoft Store: 3D Viewer, Clock, Maps, Microsoft OneNote for Windows 10, Microsoft To Do, Paint 3D and Windows Security.

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