Recently, I performed complete format on my 6 month old Toshiba Satellite L40-139 laptop and installed Windows XP Service Pack 3 (SP3) in it. It was working fine until I started playing an Audio file in it. On playing a music file I realized that the sound of my laptop was somehow not working and I need to install the Sound (Audio) drive for my laptop. So can anyone help me in finding the Audio Driver for my Toshiba Satellite L40-139 laptop which is running Windows XP SP3. Your suggestions will be appreciated.