Hi,
Windows XP Mode was primarily designed to help businesses move from Windows XP to Windows 7. It isn't optimized for graphic-intensive programs such as 3D games, nor is it well suited for programs with hardware requirements such as TV tuners.
However you may install old games which are not compatible with Windows 7. Some games which do not require high resources may work.
Check the links:
“Install and use Windows XP Mode in Windows 7” http://windows.microsoft.com/en-us/windows7/install-and-use-windows-xp-mode-in-windows-7
“Using Windows XP Mode” http://windows.microsoft.com/en-us/windows7/help/videos/using-windows-xp-mode
DianaMicrosoft Answers Support Engineer
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