I didn't answer that point because I thought you may have understood, either the files you downloaded are spammed junk files that are perhaps not really audio files or are deliberately corrupt ones, else the LW player is not behaving well. Could be both these reasons. The LW media player is not super reliable.

If you have doubts about a particular audio file, try playing it in this player: VOX & if the file won't play then it's most likely a bad file. If it does play ok, then at least for that file the issue was LW's media player. VOX is only a small basic music player, but it can play a very wide range of different audio file types. Worth having as a backup player.