does know why when upgrading installation created using installshield, uac come red shown below.
it happens when installing upgrade current user installation. both original install , upgrade have been signed using same certificate , have ensured certificate , root ca installed.
this article implies program (strictly speaking publisher) has been blocked , need "run anyway" start it:
https://blogs.msdn.microsoft.com/oldnewthing/20070330-00/?p=27433/
a windows installer major upgrade fresh install remove installed product if configured way. it's still new product requires elevation. may thinking it's same uac patching, major upgrade not patch, msp file.
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