The default media player in Win 10 is called 'universal aps' (GROVE, etc). But WMP is still there. To find WMP do START then type 'media player' then select it from list. To make WMP the default media player go to Settings/System/Default Aps and choose Windows Media Player then set file association (WMP, MP3, MP4, FLAC, etc). Wala, WMP is now your default media player (although it's showing it's age). To play DVDs on Win 10 you can use VLC player or some other program. No use fighting MS about that 'issue' - it don't bend!