Turn OFF automatic updates

Are you sure you want to do that?

My thoughts on the subject: How do I stop brave update and crash handler from loading at Windows startup? - #3 by Unindoctrinated

If you really want to, I suppose you could disable the Windows services. I have not tested this, nor will I put any real time into that because I think it would be doing a disservice. But that’s something you can try if you have some reason to do so.