which is only available if you have Pro, Enterprise, or Ultimate. See http://www.microsoft.com/windows/virtual-pc/download.aspx . If you upgrade your version you should be able to download and run it. I don't have it, but have heard good reports from others using it. And if you downgrade, there are lots of programs that now no longer run with XP that you may need to worry about-security software seems particularly prone to that.