hmm, try searching for the format (like .mp3 if you mean mp3 files, or .wma if....) then figure out where they are after locating them.

If you mean music that you ripped yourself then a guess would be:

C:\Documents and Settings\**Your Username/Accountname**\My Documents\My Music

P.S: If you are planning on sharing then please rip into quality bitrate (Like 320Kbps mp3)