Please note:- For Windows XP Pro x64 the following update has been released by Microsoft to resolve "The Intel High Definition audio functionality unexpectedly quits working in Windows XP Professional x64 Edition". This update is available from Microsoft at the following URL: http://support.microsoft.com/kb/901105 The update may be downloaded from the following URL: http://www.microsoft.com/downloads/details.aspx?amp;amp;displaylang=en&familyid=DAB139F1-065C-41E8-A148-9D79BD9D24F9&displaylang=en We recommend that this update be applied after the Intel chipset INF driver has been installed. Under Microsoft's terms and conditions Viglen is unable to provide this update.