Question: Did you just install a new CPU, and is it causing Windows to boot only in Legacy mode?
Question: Did you just install a new CPU, and is it causing Windows to boot only in Legacy mode?
Yes. This indicates the system is running in legacy mode, and you're starting from there.
The CSM cannot be turned off, causing the system to become unbootable.
As mentioned before, secure boot isn't supported due to the legacy boot setting.
Upgrading to Windows 11 is not possible at this time.