So I've been using my HP Pavilion Dv6 for quite a while now, and every once in a while a clicking sound will appear cominf from the bottom of the laptop. It clicks a few times and stops. Sometimes it doesn't do it at all, sometimes it does it for a while. I've ran a memtest. And it doesn't do it while under stress like downloading big files. It's really strange. I recorded it so it can be easily identified; https://soundcloud.com/kefkonic/laptop-clicks