During 2015, when Microsoft first announced the concept for a brand new Windows operating system, the center-focus of the company’s revamp was on mobile. Most notably, Microsoft promoted early-on the idea of Windows as a “mobile-first” operating system, which was later revealed to the world as Windows 10: a desktop operating system whose user experience has a lot in common with mobile devices, at least in regard to the look and feel of the interface.

As of the latest build 10049, which introduced us to Project Spartan, it occurred to many Insiders, that the People app, as well as the Calendar and email client app have suddenly stopped working, due apparently, to an impending update.