Microsoft had announced at some point that if computer manufacturers (OEMs) wish to distribute systems with the Windows compatibility logo, they will have to implement a measure called “Secure Boot” or “Secure Boot”.
However, we should think very seriously whether this technology lives up to its name or should earn the name "Restricted Boot".

Let's see what we mean more correctly:
“Secure Boot” designed to protect against malware preventing computers from loading unauthorized programs at startup. In practice, however, this means that computers that implement it will not boot unauthorized operating systems – including originally authorized systems that have been modified without being re-approved by Microsoft.
Αυτό θα μπορούσε να είναι ένα χαρακτηριστικό που προσφέρει πραγματικά μια Ασφαλή εκκίνηση, εφόσον ο user μπορεί να εξουσιοδοτήσει τα προγράμματα που θέλει να χρησιμοποιήσει, ώστε να μπορεί να τρέξει δωρεάν λογισμικό που έχει γραφτεί και τροποποιηθεί από κάποια άλλη εταιρεία ή από άτομα που εμπιστεύεται.
However, Microsoft and OEMS (system manufacturers) can implement these boot restrictions in a way that prevents users from booting anything other than Windows.
In this case, we should call the technology "restricted boot" (Restricted Boot), since such a requirement is a destructive limitation for computer users, not a feature security.

What is secure is at the same time restricted, I wonder why you consider them different things