Your icon may be corrupt. Try this: Start/Run/type wmplayer.exe
and press OK. See if this will activate WMP. If it does, delete your old icon
and create a new one. If it does not activate, you may need to reinstall WMP
over top of the old one. WMP Mini-FAQ http://www.nwlink.com/~zachd/pss/pss.html#wmp8repair