Steve, @Barman58
Thank you for your answers. I have since moved to the robust "MP3Tag" in concert with, to remain musical so to speak, "Musicbee" for compact disc ripping and general music playback....

I would also like to know how to find out whether one uses this application virtualisation and if not, whether it is safe to delete this folder.
Apparently others have noticed this as well, see:...

I also experienced this issue today. It seems like Windows Media Player has an issue writing metadata into the files. If that is the case, I hope that this will be corrected because I like the...