Thank you Mostafa,
I now bought me a new ssd drive 2TB and had the chance to start the win11 setup, but after 1st installation (1st screen copied onto drive) and the following required reboot the system goes to the start screen and at that point when the sign size changes from small to medium (the rotating graph) it then sudden breaks after a few seconds and the pc reboots into the bios. So I'm not able to do any configuration changes nor read out any log files. I left the pc running for hours, it just keept booting and booting. I arraged 2 or 3 times to put it into the safe mode but it ends in the fix problems - choose and option screen, does not go to safe mode, no solution at all. In the fix problems screen I did sfc /scannow and it states to have problems fixed which should be visible in the cbs.log file. No access tot that, it still keeps rebooting. dsim.exe does not work as I do not have admin rights there, but I tried to set it up, without success.
Can you give any experienced solution advice to fix that? Just to mention, I hve an AMD Ryzen 9 7950X3D with integrated AMD Radeon™ Graphics, perhaps that could be a problem, but if so, I don't know how to fix that. Appreciate youre instructions.
Best regards,
Mathias
I now managed to download the cbs.log file which I now attach. Which I'm not able it doesen't provide the file upload (;-(