MiscDownload Realtek HD Audio Driver 6.0.1.6069 admin / October 9, 2010 *the driver file is downloadable from MSI website instead of from Realtek.
MiscDownload High Definition Audio Driver 5.10.0.6013 12/25/09 for Alienware D900T Notebook admin / October 5, 2010
Sound CardHigh Definition Audio Driver 5.10.0.6013 12/25/09 for Alienware D900T Notebook admin / October 5, 2010