Windows 7 security enhancements summed up
eWeek | at | by Mike
Enterprises can expect security of authentication, data protection, privilege levels and the DNS to improve for users running the next client version of Windows.
The evidence that Windows Vista is far more secure than XP, both in theory and in practice, is abundant. With new features and standards Microsoft hopes to make Windows 7 even more secure, especially for enterprises.
A paper on their Technet site explores several new security features in Windows 7 most of which have an enterprise angle to them. In all cases there's nothing completely new, but there is better design and easier implementation for IT and users of strong security capabilities.