Bjorn3D posted an article about how to run Linux in a virtual desktop
Virtual PC has been around for some time now, with the latest version being Virtual PC 2007. While the term virtual machine thrown around a bit, it's important to make the distinction: Virtual PC creates a virtual machine on your computer, but Virtual PC is the software created by Microsoft to perform that task. Some will be surprised to hear that Virtual PC is free, the full download is available from Microsoft's website.How to Run Linux in a Virtual Desktop