I have a Sony Laptop model# VGN-FS770/W that came with Windows XP home installed on it. Everything worked fine when Home was on it. I formated the hard drive and installed Windows XP Pro. I cannot for the life of me get this laptop to have audio. It has a list of devices in device manager that say unknown. I know this is the sound card and Windows is not recognizing it as an audio device. I downloaded the drivers off of Sony's site for the audio controller and it looks as though they are being installed but he PC still does not recognize the harware as an audio controller. I did read somewhere that Sony may have had another level of software that told the system that these devices are audio but I cannot get it to work! Can anyone help here.