Installation of 15.1 fails

I've been trying to update to 15.1 on Windows 10. First, I uninstalled 15.0 from system configuration. Afterwards, I ran the setup utility of 15.1. When the installation of "ChemOffice Professional 2015" is about to start (Please wait while Windows configures PerkinElmer ChemOffice Professional 2015), the installation window will say "Time remaining: 3 seconds" and nothing happens from now on. I already waited for hours...