I made a clean install. Just mounted the ISO and ran from there. Nothing to remark on. After reading of your experience, I then went to the updates. Seven waiting!!
I had logged in with an offline account, in order to get my user name correct. When I changed my account/login to my Microsoft account, and rebooted, it insisted that I use a pin? No prob, I put in exactly the same pin as my normal password.
Otherwise everything seems to be in order. Poking around, it does look as though the previously referred to issue of incompatibility, was possibly due to the fact that it had not, at that stage, updated my Graphics drivers.