“Run multiple operating systems at the same time on the same computer, that's the need of time”
Virtual PC / VMware Player lets you run multiple operating systems at once on a single physical computer and switch between them as easily as switching applications—instantly, with a mouse click. Virtual PC is perfect for any scenario in which you need to support multiple operating systems, whether you use it for tech support, legacy application support, training, or just for consolidating physical computers. Often you will come across scenarios wherein you would require to run something on Linux, but you have a windows machine. At that time you have to install Linux log into that OS. Now when you require windows log off Linux and log into Windows. Gone are those days, its a matter of ALT-TAB now
After installing Virtual PC, you can configure it to suit your requirements. Its simple to install.
Users now can switch between operating systems as easily as they switch between applications.
Users can copy, paste, drag, and drop between guest and host. Virtual PC provides additions that you install in a guest operating system to enable this functionality.
For step by step installation and use, one can refer to the following website - http://www.pcreview.co.uk/articles/Windows/Run_Linux_in_Windows/