[wix-users] How Windows Installer creates unique S-1-5-18 value when my program is installed for all users

Christopher Painter chrpai at iswix.com
Tue Nov 13 19:20:42 PST 2018

I would suggest reading:


From: wix-users <wix-users-bounces at lists.wixtoolset.org> on behalf of David Wathen via wix-users <wix-users at lists.wixtoolset.org>
Sent: Tuesday, November 13, 2018 7:33 PM
To: wix-users at lists.wixtoolset.org
Cc: David Wathen
Subject: [wix-users] How Windows Installer creates unique S-1-5-18 value when my program is installed for all users


I'm trying to programmatically determine if my program has been installed for all users or not.

I have done a bunch of googling and one answer I found was to see if the product code exists under


I can see that when I install my application and specify all users, from a Visual Studio Installer Project based installer, a
Registry entry is created under the S-1-5-18 key.

However, the unique GUID value that it is listed directly under S-1-5-18 doesn't match my product code GUID.

Does anyone know how this unique identifier is created or how I can determine what mine is for my application?

Thanks so much,



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