I was just clarifying some of the things previously mentioned.
Looking at your output … It does not appear this is a dual-boot system…
But that still doesnt mean that windoze wasnt used previously and possibly not shut down properly.
Other examples of the Secure display: Generic Failure. errors seem to involve just such a situation.
Was windoze run on this machine previously? Was fast start disabled? And/or was it shut down all the way (are you sure?)?
See another recent example …