Hi,
The problem you are encountering is not related to Advanced Installer. I believe it is caused by Software Restriction Policies defined by the administrator of the machine on which your MSI package is deployed.
There are several workarounds for this, but it is your users' responsibility to contact their system administrator in order to modify the Software Restriction Policies.
If you have a Software Publisher Certificate, a new rule might be created to allow your signed MSI packages to be installed.
Regards,
Ionut
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Ionut Toma
Advanced Installer Team
http://www.advancedinstaller.com