Allow desktop app to be automatically closed by Inno Setup

Mail Torent

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Mar 7, 2025, 2:52:26 AM3/7/25

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Hello,

this question is more C# related, but for sure someone will know.

I have c# windows forms desktop app, and windows service (worker implementing BackgroundService).

I am implementing unattended updates for my app with /verysilent parameter.

I am killing both using taskkill in PrepareToInstall, but if the user in the meantime opens desktop app it screws the installation.

Therefore, as last resort, I am using CloseApplications=yes, and Inno sucessfully closes service, but not desktop app, and installer is stuck. How to make desktop app possible to be closed by inno setup?

Best regards

Andrew Truckle

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Mar 9, 2025, 1:21:09 AM3/9/25

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Iris documented how to deal with this via app mutex.

Mail Torent

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Mar 10, 2025, 3:16:43 AM3/10/25

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After some more investigation, I realized inno setup closes GUI apps correctly when installer is not in /verysilent mode.

In /verysilent mode, it only closes services.

So this is most probably some windows restart manager limitation.

Regards

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