Windows Virtual PC work with More than one Operating System

Windows Virtual PC (successor to Microsoft Virtual PC 2007, Microsoft Virtual PC 2004, and Connectix Virtual PC) is a virtualization program for Microsoft Windows. In July 2006 Microsoft released the Windows-hosted version as a free product. In August 2006 Microsoft announced the Macintosh-hosted version would not be ported to Intel-based Macintosh computers, effectively discontinuing the product as PowerPC-based Macintosh computers are no longer manufactured. The newest release, Windows Virtual PC, does not run on versions of Windows earlier than Windows 7, and does not officially run MS-DOS or operating systems earlier than Windows XP SP3 Professional. The older versions, which support a wider range of host and guest operating systems, remain available.
Virtual PC virtualizes a standard PC and its associated hardware. Supported Windows operating systems can run inside Virtual PC. Other operating systems such as Linux may run, but are not officially supported, and Microsoft does not provide the necessary drivers (called "Virtual Machine Additions") for Linux.
Click here to download XP Mode Virtual PC for Windows 7
Click here to download Virtual PC 2007
Source:Microsoft Website