How to Use Old Programs Using Windows XP Mode and Virtual PC in Windows 7
Just because you update to the Windows 7 operating system doesn't mean you have to lose all of your older programs and applications. Windows 7 has a virtual PC option that you can download, which allows you to use older programs and apps via Windows XP Mode.
It's the best of both worlds: The new Windows XP Mode lets you run older Windows XP business software right on your Windows 7 desktop.
Designed primarily with small- and medium-sized businesses in mind, Windows XP Mode comes as a separate download and works only with Windows 7 Professional, Ultimate, and Enterprise. Windows XP Mode also requires virtualization software such as Windows Virtual PC. Both are available free on the Microsoft website.