Correct, the N-Versions of Windows are missing some features, and the Windows media player. These Features can be important to some programs and games (for example Nvidia shadowplay and GTA V need them). Fortunatly, microsoft has a so called Media-Feature-pack, which one can install to get all the features the non-n version has. after installing this pack, it's basically the same as the non-N version.
if you haven't installed the media-feature-pack yourself, but have the windows media player, you definitly have the non-N version.
I myself have Windows 10 Pro N (i'm german), and the media feature pack has solved issues for me in the past, but my current installation seems to be broken (can't play GTA V or use nvidia shadow-play, but i used to be able to). I'll need to reinstall windows 10 in the near future, solely because of my broken media-feature-pack installation.. But because you do not have the N-version, we can assume that this is not the problem, wich is bad news for you (as you still have no fix) and good news for me (as the problem is not with the N-Version)