Recently I started hearing a alert sound on my Windows machine (Windows XP). I am not positive, but I think iTunes is the source. I always have my speakers turned on since my PC is also my stereo. The alert is just a sound, nothing with it, at least as best as I can tell. So I am not positive iTunes is causing it. All I want to know, is iTunes at fault, and if it is how can I KILL this annoying and useless sound?!?