Thanks for the answer. I really appreciate anyone who can give part of their own personal time to help other people solve their problem.
I did not left the "Get the latest updates" option on (it is the second option from top to bottom on the first image I provided, but it is written in my system's native language so it might not be clear to people that don't speak Portuguese).
Well, sorry to say, but that's not a solution at all. Windows Update should not force on my system a driver with a worse performance, regardless of its provider.
Then again, Intel is as much of a provider as is Samsung, even if the later "optimizes" Intel's hardware for their final product. I don't see why I shouldn't take Intel drivers over Samsung's if it gives me better performance. And I put quotes on "optimizes" because, as I've mentioned, Samsung drivers have significant underperformance compared to the latest Intel drives. Even if those are "wrong", as the owner of the system I bought I have the right to choose them.
Finally, Windows Update is a service provided by Microsoft, not Samsung or Intel. I get that it might be trying to "update" the system with information provided by the manufacturer, but from the moment an issue is reported with it, users expect, within reason, that a satisfying solution is presented by Microsoft (because it runs the updates directly from the users' systems). I have found numerous complaints about the same behaviour I mentioned, and not a single one offers anything in the form of a definitive solution.
Once again, I really apprectiate you taking your time to answer me, I'm affraid it doesn't solve my problem but thank you anyways.
Edit: Running Samsung Update gives me no problem at all. It doesn't try to overide my Intel graphics driver with its own. The issue lies specifically with Windows Update.