Finally Deskscapes works!
I used DSpurge
Delete all files containing dreamscapes from my OI
Uninstall graphics card drivers
Reboot the system
Everything is OK with the generic Windows graphics driver
I handed over the drivers of the radeon rx 570 8gb card (for games).
And it works.
I hope that the next update of windows (inevitable even by modifying with gpedit.msc ) will not create any more problems in several of my software.
Thanks for the quick answers even on a Sunday!