The Windows Vista Business test-drive allows you to try this latest operating system from Microsoft without having to install it on your PC. By simply logging onto our test-drive environment using your web-browser (IE ONLY), you will be able to experience Windows Vista first-hand. You can explore the product on your own, or follow along with guided exercises and videos.
http://www.windowsvistatestdrive.com/
Note: The test drive experience is currently available only to web visitors from the US and Canada
Enjoy!