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Windows Smart App Control blocking Windows Office 365 offline installer

Evgeniy Tomashevich 5 Reputation points
2025-12-16T17:55:33.33+00:00

Windows 11 Home 25H2 and microsoft 365 subscription.

I downloaded Office365 offline installer from my microsoft account page.

When I tried to install it, I got the message "smart app control blocked an app that may be unsafe".

To install Office, I disabled Smart App Control and everything worked.

After installation, I decided to turn Smart App Control back on, but it turned out that it couldn't be turned on without a clean reinstallation of Windows.

I have only one question: how is this even possible?

Microsoft 365 and Office | Install, redeem, activate | For home | Windows
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  1. DaveM121 885K Reputation points Independent Advisor
    2025-12-16T18:33:09.9133333+00:00

    Currently to enable Smart App Control that does require a full clean install of Windows.

    However Microsoft have realised this is a problem for many users, if you wait a small while, Microsoft have recently announced in an upcoming update for Windows, you will be able to enable and disable Smart App Control anytime without needing to reinstall Windows.

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