Windows Xp Mode for Windows 7 Virtual PC
If you own windows 7 and wish to run Windows XP in a virtual mode, you can download the free XP mode.
You can read about all the features here:
Windows Virtual PC: Features
To download go here:
Download Windows XP Mode
Please note it is a 500MB file. Also note on one page, it states it only works for Windows 7 Ultimate and Enterprise Editions, yet on the download page you can select any version of Windows 7.
Click here to watch the video:
Windows XP Mode - Windows 7 features - Microsoft Windows