My desktop has done something like this since I got it built but recently it just seems much louder. Is it just harddrive noise? Power supply issue?
I don't think it's the fans since they're both next to each other at the top of the desktop, and I hear the nosie coming from the bottom. It gets quieter as the computer settles but upon startup and when doing something intensive like opening up a program, connecting devices, opening up a folder with many files it gets louder.