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Windows Vista shipped to business customers on the last day of November 2006, so the end of November 2007 marks the one year anniversary for supported production use of the product.
This paper analyzes the vulnerability disclosures and security updates for the first year of Windows Vista and looks at it in the context of its predecessor, Windows XP, along with other modern workstation operating systems Red Hat, Ubuntu and Apple products.
The results of the analysis show that Windows Vista has an improved security vulnerability profile over its predecessor. Analysis of security updates also shows that Microsoft improvements to the security update process and development process have reduced the impact of security updates to Windows administrators significantly compared to its predecessor, Windows XP.