@ diverjer
I have the same situation. My 2023 intuitupdater.exe file (in Update Service v. 5) also says "unknown publisher" and "untrusted", and whenever I try to update through the interface, it produces the yellow UAC warning (my UAC setting slider is the same as yours.) When I look back at 2022's files (Update Service v. 4) the intuitupdater.exe also is unknown and untrusted, but it didn't produce any UAC error for me last year, from what I remember. So I don't know why it is doing so for me this year. I haven't decided what I plan to do, but I suspect that like you, I'll eventually have to accept it, although that will rub me the wrong way.
