How to run other systems on a pc (must be window's)

1. First you will have to download the program that can run them : http://www.microsoft.com/downloads/details.aspx?FamilyId=04D26402-3199-48A3-AFA2-2DC0B40A73B6&displaylang=e
2. You will have to use  a disk or a image file try downloading from www.thepiratebay.org
3. it will be a torrent file so if you don't know what to do with a torrent file  go on the link : http://eazytutorials2.blogspot.com/2010/08/how-to-download-torrent.html 
4. add it. XD