As the company contemplates Control Panel's future, it looks like the Redmond giant is ready to lay Legacy DRM (Digital Rights Management) services to rest once and for all. This will affect the legacy Windows Media Player, Silverlight clients, Windows 7 and Windows 8. Microsoft does not specifically mention Windows 8.1 in this list so users still running the OS should be able to enjoy the features for a while.

https://www.neowin.net/news/microsoft-kills-legacy-drm-support-on-windows-media-player...8-silverlight/