So this was an annoying problem. Since I use OS X and Windows 8 on the same computer, I boot into the other OSes very often. When I would boot into Windows 8, the first thing I would hear would be the device disconnected sound (the sound you hear from unplugging a USB device). It took me a while to find out what the cause was. I did the usual routine. I disabled all service and startup items, then enabled them one by one.
It seems that the NVIDIA Streamer Service was the cause of this. I just wanted to let people know about this in case they run into the same issue. As you can imagine as a developer and graphic designer, I have a lot of services, so finding the one that caused it was not a fun time.
Here is a question though: For those that have experienced this (or know what the Stream Service is doing), why does it play that sound if the service is enabled?