I have installed Microsoft XP Professional recently on my Dell Inspiron 6400 Laptop and I can't able to install correct Audio and Video drivers. I tried Sigma Tel Audio driver from support.dell.com but, it is not working. Even I can't able to play any videos. I think it may be because of my display drivers. Can any body help me where I can get exact drivers and any settings I need to change. I can able to connect to Internet.