PC Review have a new article on how to run Linux in Windows, by emulating a Virtual PC

Many users of Windows XP and Vista will want to try Linux at some point, often just to see what all the fuss is about. There are many different Linux distributions and it isn't convenient for a non-technical user to set up dual booting alongside an existing Windows install. Thankfully, there are tools available which mean you can play with a full Linux install inside the familiar surroundings of Microsoft Windows.

Run Linux in Windows