Hi, a lot of thanks for your effort.
This morning I used a DISM-command with the wim.exe of the newest windows.iso.
After this the sfc /scannow works, but no updates are possible. Some other programs (wsuoffline,Dism-gui-x64 an setupdiag) helping. But no updates. 10 Minutes before the inplace-upgrade to vers. 1909 was successful!!
Updates works!!! Now I have to make some little things in the settings. I think everything works perfekt!
Thank you for your help and have a nice weekend.