Happened to me as well, btw it isn't that annoying. Don't know if it's solvable..
btw try opening the device manager from My Computer -> Properties -> Hardware -> Device Manager. Show hidden devices (View -> Show hidden devices). Under Non-Plug and Play Drivers, open the properties for Beep. Go to Driver -> Stop, and the beeping will cease. I think you can also Disable the device.
Not sure it'll work.