KN editions of Windows 8.1 and Windows 8 don't include media-related technologies like Windows Media Player or Camera. To play or create audio CDs, digital media files, and video DVDs; organize content in a media library; create playlists; convert audio CDs to digital media files; view artist and title information of digital media files; view album art of music files; transfer music to personal music players; or record and play back TV broadcasts after Windows 8.1 or Windows 8 is installed, you'll need to install a media player and other software from Microsoft or another company.
Internet Explorer 11 in KN editions of Windows 8.1 doesn’t include media features like adaptive streaming or Digital Rights Management (DRM) playback. To add these features, you’ll need to download and install the Media Feature Pack for N and KN versions of Windows from the Microsoft Download
Center, as well as an app that uses PlayReady DRM from the Windows Store, such as the Xbox Music app or Xbox Video app. The app must be installed to specifically turn on DRM features, while all other media features are installed with the Media Feature Pack.
For more info about adding features, see Add features: FAQ.