Windows Media Player Legacy - Microsoft Support To manually troubleshoot or upgrade your installation of Windows Media Player, try the following: Select Start button, enter features in the search, and then select Turn Windows features on or off
How to play MP4 files in Windows - Microsoft Support How to play MP4 files in Windows Select Start > search for File Explorer, or select File Explorer from the taskbar Press and hold (or right-click) the MP4 file you want to play, select Open with, and then choose your preferred file player from the list of applications
Codecs in Media Player - Microsoft Support Codecs allow you to play different formats of audio and video files Media Player supports a wide variety of codecs Most are included out of the box; some additional codecs can be installed from the Microsoft Store