Microsoft announced Monday that they will no longer tolerate adware that utilizes man-in-the-middle attacks or out-of-browser techniques that monitor and modify the network traffic between the web browser and a server. These techniques utilize network stack manipulation, function hooking, and proxy servers to sit in the middle and manipulate web traffic. Google took aim at these same type of adware purveyors back in March 2015, the biggest surprise is how long it took Microsoft to take similar action.
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-warns-adware-developers-to-stop-using-man-in-the-middle-attacks/