Lenovo Thinkpad Windows 11 upgrade stops - No Error

I've tried upgrading Windows 10 Pro to Windows 11 many times and it always fails at about 20% after a reboot. The Lenovo image displays then it just stops. After a couple of restarts it reverts back to Windows 10. I've got 100+gb disk space available and have removed most non-microsoft apps including Bit Defender anti-virus. The laptop meets Windows 11 upgrade specs.

The setup log files from the panther folder are attached.

Thanks in advance for all help.

If you don’t have any personal data on the machine, why not do a clean install?

I'm keeping the clean install as plan B. I'm guessing it will take a day or 2 to get all my apps reinstalled and working as they are now, so I would like to keep trying to get the upgrade to work.