@bontchev You mean that nobody thought of understanding how AV software disable Defender up to this point?
That's hard to believe. If I wanted to write malware, that's one of the first things I'd be looking at. Any good spy movie involves security guards shifts.
@karl Well, it's the first implementation of this idea that I have seen. If there are others, I simply don't know them.
It's a bit counter-intuitive, because the idea is not "disable Defender" (although this is what happens); the idea is "tell the Security Center what AV I am installing".