The app automatically installs Bing Visual Search and includes code to decrypt cookies saved in other browsers, Rivera said, and it also brings a “free” geolocation web API to the system.
The developer discovered “many” nasty tricks Microsoft integrated in Bing Wallpapers, which include trying to change the browser’s settings and set Edge as the default system browser. If the default browser isn’t Edge, the app will open the default browser after some time asking to enable the previously installed Microsoft Bing Search for Chrome extension.
An example of ill intent on Microsoft’s part: https://mashable.com/article/windows-10-upgrade-snafu-analysis
If you haven’t used windows in years then you might not know how bad it has gotten, but … it’s bad. Windows update is not just for security updates, it’s also there to change users default browser to edge, their search engine to bing, trick them into using onedrive (too bad if the synced files get corrupted), old features get disabled for no good reason, it hijacks other browsers to show messages and change browser settings, …
All those things are definitely not for security, but rather a way for Microsoft managers to meet KPI, for example: they want more users of a new application, so they remove the old way of doing things and boom, their quarterly report looks prettier. And to top it all off Microsoft doesn’t test updates properly anymore in house, so it’s the customers who are life testing that shit. And because those users have to keep updating windows for security, Microsoft has them over a barrel.