Each system must be distributed with a Windows Vista Business or Windows Vista Ultimate Certificate of Authenticity (COA) and must have the appropriate activation markers for both OA (OEM Activation) 2.X and OA 1.0.OEMs may now choose to install Windows XP Professional or Windows XP Professional Tablet PC or Windows XP Professional X64 editions instead of Windows Vista Business / Ultimate, provided they meet the following additional requirements :
However, Microsoft is enhancing the End User downgrade facilitation options for downgrading Windows Vista Business or Windows Vista Ultimate systems to Windows XP Professional. Windows Vista Business and Windows Vista Ultimate remain the only Windows Vista editions that have End User downgrade rights. Installing DirectX 9 Can & Will Kill DirectX 10.Latest Details On Windows Vista Service Pack 2.Windows Vista Service Pack 2's Latest Release Schedule.Microsoft Office 2007 Service Pack 2 Details.The Microsoft Windows 7 SKU Strategy Revealed!.Microsoft Internet Explorer 8.0 RTM Details.An Inside Look Into The New Windows 7 Experience Index!.Windows Anytime Upgrade For Windows 7 Revealed!.The Microsoft Windows 7 Free Upgrade Option Program.
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