Sounds like an electrical buzz coming from the hard drive vicinity. Ram is right behind it, so I did perform the windows ram check. It's definitely not the cpu fan. It will happen idle or while I'm using it. I pulled the computer apart and cleaned it inside, so far no electrical buzzing. I don't know if unplugging it and hitting the power button to completely discharge it for cleaning helped yet. Guess I'll have to give it some time and see.
Chris