I'm running Windows XP and Internet Explorer browser. My question is: EVERY time I start my computer, at about the exact same time each time, (5 and 1/2 to 6 minutes into the session), my computer makes ONE high pitched squeal that lasts only for a second. Noise is so short lived I can't determine exact location but it is coming from CPU, not speakers. It sounds like something spinning at a very high rate of speed but again it happens so quickly that I cannot really determine. Computer runs perfectly otherwise. It is only 6 MONTHS OLD. Dell Dimension E510, running XP media edition. Can provide any other information you might need, but am most concerned that it is a hard drive issue. I have gone around and around with Dell via email but they have me tearing the whole computer apart and running voluminous diagnostics. I am going to die of old age before THEY solve the problem. Can anyone help? Thank you. DLFIt COULD be a built in MOTHERBOARD speaker to alert you of someting, check if the CMOS battery is dead if so it could be a low CMOS battery warning. if not it could be a heat sensitive fan that squealed when your processor HITS a certain temperature.