Hello HilaryB,
I understand that you are getting a buzzing sound from your speakers.
Go into device manager and uninstall the audio driver.
Restart the computer.
As the computer is booting back up, tap the F10 key.
When the BIOS setup utility loads, press F9 to set defaults and F10 to save and exit.
When the computer boots back to windows, it will load the audio driver.
Here is a link that will show you how to get to device manager.
Let me know how everything goes.
