Computer: Dell Optiplex 5050 running Windows 10.
Tried to play a movie DVD ("1776"). Apparently no app capable of playing video on my Optiplex, or at least it didn't function. Suggestion by Help file was to buy or try a DVD/Video player from the MS Store. Downloaded Parma Video Player (had 4 stars and was free). Wouldn't play video DVD. And also won't play music files. Also, Windows Media Player does not work.
In addition, when I go to Setup, I see an icon for a Blu-ray disk player and am told it is "Not connected."
Windows Media Player played music with no problems before installing Parma Video Player.