Windows Upgrade Help and more

Same here. Agreed, updating the BIOS often unlocks it. Just make sure to enable the "TPM" or "Trusted Platform Module" setting in there too, as Windows 11 needs both.

You could also try using the Media Creation Tool to perform a clean install instead, which sometimes bypasses upgrade errors.

I had the same problem. For me, it was an old VPN client that was causing the rollback every single time.