After upgrading to windows 10, I now realize that Microsoft Windows Movie Maker is no longer available or supported, these files have an extension of .mswmm and cannot even be played by windows media player. Can they be converted to windows media player files (.wmv) or a more universal playable file such as AVI, Mpeg4 or Mov etc? If so surely Microsoft should have something to do this free of charge as they have caused the problem!

Chris