The notebook came with Vista which didn't work properly at all, it was extremely slow so I wanted to go for either Windows XP or some Linux distribution. I tried a Windows XP SP2 CD first but it didn't work because it couldn't detect any hard disks. Then I used a Windows XP SP3 ISO and added the Intel SATA controller drivers to it and burned it. It actually worked and the operating system runs fine and much faster now. But I have a problem with the sound. I installed the chip set utility and the audio drivers from Toshiba - Download drivers: (csutil-20071120144450.zip, sound-20071120150900.zip) for this model but it still fails to detect it and there two items with a question mark listed in device manager: PCI Device Unknown Device I have installed the WLAN drivers etc, I'm not quite sure what the "unknown device" could be, I suppose the PCI one is that Realtek sound card. Would somebody please help me out?