Re: AC cos I'm ashamed of saying something nice about Vista
The first UAC iteration was really too intrusive (read Mark Russinovich about it at https://docs.microsoft.com/en-us/previous-versions/technet-magazine/dd822916(v=msdn.10)) - and that was fixed in Windows 7.
Apple fell in the same trap with Catalina.
Moreover IIRC VIsta Home Basic edition could not enable the Aero mode (without some tricks), regardless of the GPU, and not a few OEMs installed that edition.
Anyway with Windows 10 MS solved the issue giving everyone the worst UI.