What is XP mode, what is required to support it from both a hardware and software perspective, and how do I use it?
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 and Ultimate.
Note: The system CPU must support VT technology, and the system BIOS must have this feature enabled. Lenovo ThinkPads support VT, while only some IdeaPads support this feature. Windows 7 Home Basic, Starter, and Home Premium do not include support for this feature.