Are you using the LW player? It's not very good & can give you skips/pops when another player will play the song fine.
If you're using the LW player, disable it & make something else your default.
Also preview the song, if it sounds crappy then go for another version of the file. Try to get the highest bitrate...should give you the best quality. Anything under 128 is rubbish, most people will tell you 128 is rubbish too:wink: so try for a 320 bitrate if it's there.

Some people just share yukky files.