I own an HP Pavilion zv6000, and recently installed Windows 7 on it. The OS is great, and I can't find any glitches in it-as far as daily usage goes-except for one. THE SOUND ISN'T WORKING! I installed the latest Realtek driver, and when I go to the device manager and click on "Realtek AC'97 Audio", the dialog box that comes up says "This device cannot start. (Code 10)". Can anyone help?