HI Michael,
Thanks for your super fast feedback! I recognized that on an older Windows 7 pro machine with a Nvidia Quadro graphics card after installation and without booting again.

But I followed your hint to reboot and the issue was gone. While rebooting and the system was shutting down, I got the error message (exception) "Unknown Software Error......." and the window was named "Hidden Window: LogiOverlay.exe Error in application"

So, if rebooting solves the issue, it's no issue!!

Thanks a lot,
Joerg