Dear Lifehacker, Windows Media Player hijacked my MP3 files and converted them all to WMA. I want to change them back easily in one sweep—but am not the most savvy user. Help? Signed, Gimme My Beats ...

MP3 technology is revolutionizing the music business. Now, with the click of a mouse and a little expertise, listeners can download their favourite tunes from a cyberspace menu of thousands of songs ...