In looking at your snip I can see columns labeled Title, Contributing artists, and album. This leads me to believe your mystery files or folders might have something to do with your saved audio in Windows Media Player or some other media player like VLC. If that's the case I'd further guess you're seeing metadata (tags) attached to those audio files. Metadata can be included for books, photographs, audio files, and web pages. Digital audio files can feature album names, song titles, year of publication, genre, etc. What is Metadata?
If these files are, in fact, metadata you probably don't want to eliminate them because they provide another way to search for your audio files. If you could provide a bit more information as to where these files or folders are located and under what circumstances they appear someone may be able to give you better information as to what they actually are.