Do you want to try Windows 7, but you do not want to install it on your HD or mess with you existing installation?
Well, here is your shot:
Step1: Download a 90 day trial from technet (sitelink). This is a limited offer only, so hurry up!
Step2: Get hold of a large enough USB drive
Step3: Follow these steps to create a bootable USB drive. Easy peasy! (link)
