Hi Guys,

I am getting this Error 1718 msi was rejected by digital signature policy when launching a application as a user.
This is happening on Windows 8.1 x64. I have read that on XP and Server 2003 a KB update was released by Microsoft but isn't relevant for 8.1 obviously.
Wondering if anyone has any advice please.
I was also wondering if it could have anything to do with Applocker i am currently exploring that avenue.
The application in question is a in house application and 65,716KB.
Any help is much appreciated.

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I had the same issue with an older MSI from a vendor.  I would get the same issue when a non-admin user would launch the software for the first time.  I found that it was trying to access the actual MSI file itself to finish the setup for that user account, since that user didn't have full access to where the MSI was installed from, it would give that error.  To resolve the issue, I made a script that first copies the MSI to a local hidden folder, which authenticated users have FULL rights to, c:\CABS\ then run the Install from there.  When the user launches the application the first time, it has full access to the MSI and finishes the setup and opens the program successfully.  Hope that helps you too.
Answered 05/22/2015 by: gwblok
Senior Yellow Belt

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Check the application event log to verify whether the act of running the application is triggering a self healing operation in the installation MSI.  Does the MSI have internal or external cabs/files?
Answered 08/28/2014 by: EdT
Red Belt

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