Windows 7 is the next release of the Windows client operating system, built on the secure foundation of Windows Vista and Windows Server 2008. Performance, reliability, security, and compatibility are core tenets of this release as we collect your feedback to meet our engineering goals of making Windows 7 the best-performing and most stable Windows operating system to date. New innovations in the product are designed to augment your ability as an IT professional to better provision and manage increasingly mobile PCs, protect data, and improve both end-user and personal productivity.

1. Visit the Windows 7 Beta download page.
2. Choose your language.
3. Choose a 32-bit or 64-bit version of the Beta. To see if your computer can run a 64-bit version of Windows, in Performance Information and Tools (Start>Control Panel>Performance Information and Tools) click View and print details and then look under 64-bit capable. For more information that might help with your decision, see 32-bit and 64-bit Windows: Frequently Asked Questions.
4.Get a Windows 7 Beta product key. (You’ll need it later for installation.)
5.Download the Windows 7 Beta.

Windows 7 Beta download page (login required for downloads and product key)

Direct links: 32-bit | 64-bit (producy key required for installation)

Windows 7 homepage