I'm using Windows 10 Pro and Windows Media Player on a Dell PC
As a test went to :
Library>Pictures>All Pictures
Watched them in the DEN
My system includes Blue Ray Disc/DVD Player ...BDP S580
See attached file for rest of my set up
If you are the original poster (OP) and your issue is solved, please remember to let all of us know and click the "Accept as Solution" button so that others can more easily find it. If anyone has been helpful to you, please show your appreciation by clicking the "Kudos" button.