This is a big deal. It means if people have broken or unlicensed AV, or AV vendors who aren't adding registry key (see spreadsheet, many aren't planning to) they're not going to get ANY new security patches via Windows Update service. Check compat here: https://docs.google.com/spreadsheets/d/184wcDt9I9TUNFFbsAVLpzAtckQxYiuirADzf3cL42FQ/edit?usp=sharing …https://twitter.com/GossiTheDog/status/950325474022092800 …