How to setup DLNA media server on Windows 8

You can share media stream over network using Windows Media Player. But it is not available by default. So, in order to enabling this feature, you need to open Windows Media Player and select Stream menu. Then, it will open Media streaming options. So select Turn on media streaming button. You can list which DLNA devices are available on the same network. Select the one you want to share with and then press OK. Note that you also can select specific devices can access only specific folders from your Libraries.

Reference: How to Set Up Your Windows 8 DLNA Media Server