when you downloaded iTunes, it asks you if you want it to be your default player. When one selects yes it converts all files to the apples format with iTunes icon. I always tell people to make sure to read every little window that pops up carefully when downloading players. If not some major changes will happen to ones system, that may not harm the system but most users do not know how to revert back to original settings. No big deal just a big pain most of the time for the users. To change the icon back to WMP, you have to select a music file and right click it. Then you get a window with some options, choose open with, then select WMP, then you should get a window that will ask you if you want to make this your default option to open all these type of files, click yes and ok. Then close out all your windows, then reopen your music files and the icons should be back to the MS icon (mp3 logo). That should do it for you.