Make UAC optional in Windows Installer on Vista

Question

I\'m have written an msi file that offers a choice of \"per-user\" or \"for all\" installation in the UI phase, and now find that the installer fails on Vista:

Answer 1

Unfortunately, the Windows Installer does not provide a way to create a single package that can install per-machine and per-user but only prompt for UAC on the per-machine case. The issue is that the bit that can suppress the UAC prompt is stored in the SummaryInformation stream and is not modifiable while the package is executing.