This problem Is caused by a bug of Microsoft Operating System. A patch file need to be installed In order to fix such error. When the system are using HD Audio such as Realtek ALC 880 / 882 /883 / 861 chipset , a Microsoft patch file Is needed. Please refer to following link accordingly In order to download the Patch file from the Microsoft website. Windows Server 2003 http://www.microsoft.com/downloads/details.aspx?FamilyId=D0934D06-15B3-4A65-8C52-746BEB24E86C&displaylang=en Windows Server 2003 x64 Edition http://www.microsoft.com/downloads/details.aspx?FamilyId=0E850506-50EE-4458-902F-F9FC59201B04&displaylang=en WinXP x64 Edition http://www.microsoft.com/downloads/details.aspx?FamilyId=DAB139F1-065C-41E8-A148-9D79BD9D24F9&displaylang=en
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