Toshiba A105-S4211 4G RAM After installing Windows 7 on my laptop (clean install), everything's good EXCEPT when playing music. There is an intermittent loud buzz which lasts for a second or so - this happens only once every 5 minutes or so, but is very annoying. I tried updating the drivers to Realtek, which came with the computer originally, but it did not help. Can someone help? Thanks.