I have a Compaq Presario M2000 laptop, almost 2 years old. Never any problems until about a week ago, when it started making a bizarre noise. The noise ONLY happens when I'm in Internet Explorer, when I change webpages or open a new link. It's a quick, harsh, buzzing noise, and it is silenceable by muting the volume. But I have no idea what causes it, and it's really annoying. Beyond the annoyance factor, I'm worried that it's a harbinger of something worse to come, like the death of my sound card or something. Anyone experienced this?