Don't blame me, it is a Microsoft product:
"Windows Virtual PC provides the capability to run multiple Windows environments such as Windows XP Mode from your Windows 7 desktop. To download Windows Virtual PC and the Windows XP Mode environment, please follow the steps below. For information on how to set up Windows Virtual PC and Windows XP Mode, check out Running Windows Virtual PC with Windows XP Mode in the Documentation section."
Get it [link=http://www.microsoft.com/windows/virtual-pc/download.aspx]HERE[/link].