I was able to solve the problem:
The graphics card driver 26.20.100.7641 supplied by Microsoft is defective.
I downloaded and installed driver 27.20.100.9030 under Downloads for Intel® Iris® Plus Graphics. However, the previous driver 26.20.100.7641 was still displayed in the device manager after the restart. I then removed the Intel® Iris® Plus graphics card including the driver uninstallation in the device manager.
When searching for new hardware, the graphics card was set up again with the new driver 27.20.100.9030.
However, the old driver 26.20.100.7641 was installed again during the next Microsoft update search 🤬
Here I was able to use the "Predictive driver" option in the device manager and then the 27.20.100.9030 driver was active again and that did not change after several restarts. Even with a manual Microsoft update search, the old driver 26.20.100.7641 did
not come back.
I hope everything is going as it should now ...
Greetings
Uwe