I purchased and donwloaded an MP3 from Amazon. The first time I played it with Windows Media Player (WMP) it was fine. The second time, however, CPU usage went to 100% and stayed there. The file plays fine with other players (QuickTime and Real Player) and even with WMP on another computer. Only this one file gives the problem on this one computer, running Window XP SP3. All other MPS2 and audio files play OK. I first tried deleting the WMP database - with no improvement. I then completely uninstalled Windows Media Player, deleted all the associated files, but not the original music, restarted the computer and reinstalled WMP. Still the same result. Lastly I converted the MP3 to both .WAV and .WMA formats, and when I tried to play them with WMP I got the same 100% CPU usage. It so thoroughly uses up all the CPU that I have trouble even opening Task Manager. I am really puzzled. Any ideas?