this isn't a mac question, but i'm stumped here... my parents got themselves a new computer for christmas, and yesterday i helped them set it up. it's a dell dimension 4100 running win XP. this morning when i got up, i thought i heard someone playing the harmonica in my parent's family room. which is odd, but it was pretty faint and i didn't hear it after a minute, so i figured it must be coming from somewhere else. but i sat down in front of their computer, which was asleep with no users logged in, and it did it again. a few bars of harmonica, clearly coming from the speakers. (a bluesy chicago style, thanks for asking.) i went through all the sound themes and couldn't find any "randomly play harmonica while sleeping" settings, and i can't figure it out. am i going crazy and hearing things? is this computer haunted by a jazz man? in a word, wtf?