Microsoft extended the Windows Enterprise Trial program till Dec 31st, 2010 to download and evaluate the trial version. Enterprise trial is designed specifically for IT Professionals, so that you can test your software and hardware on a final version of the product. In addition, it provides the opportunity for you to become more familiar with the key improvements over previous versions of the Windows operating system, and experience firsthand how Windows 7 can make your PC environment more productive, secure, and manageable. Few thing to be aware before you install trial: You’ve 10 days to activate the product, else the system'll shut down once every hour until activated. Visit FAQ; 90-day Trial’s full working version of Win7 Enterprise. It willn’t require product key; 90-day Trial will shut down once every hour when you reached end of 90-day evaluation period; After 90-day Trial expires, if you wish to continue to use Win7 Enterprise, you’re required to purchase and perform a clean installation of Win7, including drivers and app. Please keep this in mind; Win7 Enterprise isn’t available through retail channels; Technical details/updates/questions: Visit Win7 support forum.
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