The Windows 7 Enterprise is designed specifically for IT Professionals interested in experiencing the Windows 7 Enterprise on behalf of their organization, for both software and hardware testing purposes of the final version of the product. In addition, it provides the opportunity to become more familiar with the key improvements over previous versions of the Windows operating system.
This 90-day trial of Windows 7 Enterprise can be downloaded absolutely free until the end of the year (December 31, 2010). It will not require a product key; it is embedded with the download. Both 32-bit and 64-bit versions are available and five languages are supported: English, French, German, Japanese, and Spanish. After the 90-day Trial expires, if you wish to continue to use the Windows 7 Enterprise, you will be required to purchase and perform a clean installation of Windows 7, including drivers and applications; Windows 7 Enterprise is not available through retail channels.
Official Guidelines by Microsoft:
Protect your PC by backing up your data first.
Don’t test Windows 7 on your primary home or business PC.
You have 10 days to activate the product. If not activated within 10 days, the system will shut down once every hour until activated.
The 90-day Trial will shut down once every hour when you have reached the end of the 90-day evaluation period.
Minimum System Requirements:
1 GHz or faster 32-bit (x86) or 64-bit (x64) processor
1 GB of RAM (32-bit) / 2 GB RAM (64-bit)
16 GB available disk space (32-bit) / 20 GB (64-bit)
DirectX 9 graphics processor with WDDM 1.0 or higher driver
Download here (bottom of the page)