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.
To download Windows XP Mode or learn about its system requirements, visit the Windows Virtual PC website.