Good luck, I rolled back to Windows 10 last night because I wanted to try the registry change method for Windows 11 installation on an old PC as recommended by MS. I tried from a mounted file set on the hard drive after putting in the registry changes, but that didn't work so next I'll delete the registry changes and boot from mounted file set on a usb drive, then at the fail message I can get to X:sources command prompt from shift+f10 and redo the registry changes, but I'm not too optimistic.