>>>Info: Attempting to load a 64-bit application, however this CPU is not
compatible with 64-bit mode.
It appears you are trying to run a 64 bit version of XP on Virtual PC, which is not supported. http://www.microsoft.com/windows/virtual-pc/support/faq.aspx>>>Does Windows Virtual PC support 64-bit Windows XP as a guest operating system?
No. Windows Virtual PC and Windows XP Mode was designed to help small business with application compatibility from Windows XP to Windows 7. The majority of business applications currently run on 32-bit versions of Windows XP.<<<
VirtualBox or VMWare do support running 64 bit XP if I'm not mistaken.
Edit to add: Confirmed, VMWare Player does support Win XP Pro (x64).
Edited by Union_Thug, 28 October 2011 - 03:59 AM.