Windows Virtual PC 

It is a  virtualization program for Microsoft Windows. If you are running Windows Vista or Windows XP on your physical machine, you can still use Microsoft Virtual PC 2007 to run multiple operating systems at the same time on the same physical computer. Switch between virtual machines with the click of a button. Use virtual machines to run legacy applications, provide support, train users, and enhance quality assurance.

This picture shows a Windows 7 Computer with virtual PC installed.  Running Windows 7 and Windows XP together.

                                      Click here to download Virtual PC today.