If you receive a This app has been blocked for your protection message in Windows 11/10, fix it by using REGEDIT, GPEDIT, CMD or SmartScreen.

Microsoft Windows Windows Help How to fix 'This app has been blocked for your protection' prompt on Windows 10 PC How-to By Cale Hunt published August 2, 2018 ...

MMC.exe app has been blocked for your protection This is a permission issue where if a regular user tries to run such system tools will result in saying that it has been blocked.