If you tell me what you're trying to play, I can help you set them up as the default. Windows Media Player Legacy - Microsoft Support
: Select Custom settings to manually choose privacy options and media library locations. Set as Default : Go to Settings > Apps > Default apps . Find Music player or Video player . Select Windows Media Player from the list. Setup Of Windows Media Player 12
💡 : If it doesn't appear in the "Add a feature" list, search for "Turn Windows features on or off" in the Start menu, expand Media Features , and ensure Windows Media Player is checked. If you tell me what you're trying to
Once installed, search for "Windows Media Player" in the Start menu to open it. expand Media Features