Technet have published an article on the security features of Windows 7, including more information on Windows Biometric Framework, Extending Authentication Profiles, Bitlocker To Go and UAC Improvements:
Read the whole article in the May edition of TechNet here.Windows Vista introduced a variety of new security technologies that had a significant impact on the Windows ecosystem. User Account Control made it clear that Microsoft wanted to make easy for users to run Windows without being in the Administrators group. BitLocker introduced full volume encryption for the Windows client. Protected Mode Internet Explorer helped to make browsing the Internet a safer experience.
In Windows 7, Microsoft has continued its investment in security by adding new technologies as well as enhancing many of the technologies introduced in Windows Vista. In this article, I will provide an overview of the new security features and enhancements you'll find in Windows 7.