Click Here for Windows 7 – 100 Most Asked Questions: Tips, Tricks, Hints and Practical Guide

After Microsoft lifted their 2.5 Million Download limit of their first Public Available Beta of Windows 7 , however Microsoft officials said activation keys for the code would be capped at 2.5 million, but users who try the beta after that limit is reached will be able to trial it for at least 30 days.

So crack on and start downloading!

http://www.microsoft.com/windows/windows-7/beta-download.aspx

I’d recommend downloading a version of VMware to Run this as a Virtual Test Bed onto of your existing OS