Same problem here, Cura 3.2.1 silent installation is not exactly silent, as it shows several popups about Arduino USB drivers, and some other drivers. It apperas that the drivers are not signed, an the target OS, Windows 10 Enterprise, does not allow installing unsigned drivers without consent.
We are using Microsoft SCCM 2012 to push software to our clients, so we really need fully silent installers. We can't have installers that require the user to click an Ok button to proceed.
The latest version we pushed with SCCM was Cura 3.0.4, which installed just fine. Can Ultimaker provide an installer that contains properly signed drivers, or at least give us the option of skipping the driver installation silently ?