Hello Paloma,
Thank you so much for this. It worked for me. I was almost at the "Restart to install" page and the method worked.
I want to add something here : Even after doing the whole process and normally restarting the machine, it would still show me the message to restart to complete the Windows 11 installation on the Windows Update page but clicking on the "Check compatibility/eligibility for Windows 11" on the right panel removed the prompt.
Also, I have a further question regarding this.
So if I decide to go back to upgrading to Windows 11, removing all the registry values that we updated as part of this solution, should work, right? Or should we follow some other procedure?