TechTarget reports: "When Vista was released to manufacturing, Microsoft co-president Jim Allchin told the press that the number one reason for upgrading to Vista is that it's far more secure than previous versions of Windows operating systems. In the year since Microsoft released Windows Vista to corporations, and just under a year since the OS was released to consumers, Vista's new security features have drawn both praise and criticism. In this article, I take an objective look at security features that seem to be drawing the most attention."
This a good article that talks about some of Windows Vista security features (User Account Control [UAC], Windows Security Center, and Windows Defender). I like this article because it seems balanced in the opinions that are expressed.