...I tried to uninstall AVASt via Windows 10 Apps & Features. But Windows tells me, that there's an aktive installation process!
I can't uninstall AVAST.
Maybe this is the reason: the install process hasn't finish properly! So AVAST asks me every Windows start to finish the installation (free or premium installation).
And the AVAST cleanup.exe doesn't help.
Afer I reinstall AVAST I have the same issue.