Got something else you could try, rebuild the desktop for starters. Also open file exchange control panel. Check the setting for mp3 extention. It should be set to open with itunes or quickime. I don't think that's really the problem as you have successfully downloaded an mp3. But it's worth looking at. Lastly it is possible you have received a few bad files. Download one you know to be a good file. Like maybe the one you already got that was good. First move the other one out of your shared file so it doesn't get overwritten just in case.