Hmm, at times say for a week I'll hear a sound like a door opening and closing and very faint, after it just disappeared for several months until it came back. I even changed speakers (not because of this) and it's the same. I never did solve solve it. I guess there's a ghost in there.
Everything that irritates us about others can lead us to an understanding of ourselves. -- Carl Jung
eVGA X58 tri-SLI, i7 930 @ 3.8GHz., Corsair 6GB Dominator, Inno3D GTX470, eVGA260
ASUS P8P67 Pro, i7 2600K @4.60 GHz, 8GB RAM, eVGA GTX 460