For a while, people using the cheaper end quad core Intel Q series processor find themselves unable to install Windows 7's XP Mode due to a hardware requirement for the VT technology.
While VT speeds up the virtualization using hardware, by no means it is impossible to purely run on software especially if you have quad core or more.
Fortunately, Microsoft had finally realized this and had enabled the option to run XP Mode WITHOUT the VT Technology. This is shown in the 3rd button when you attempt to download Microsoft Virtual PC via:
This is indeed a great news to many including myself who has more than a few Intel Q8200 around.