Is Windows Vista a secure operating system?

Windows Vista claims to be a very secure operating system as a result for the new security development process at Microsoft. Well, seems to be they still have flaws and they are new, not legacy ones. Take a look on this interesting link where system privileges can be obtained on a Windows Vista computer if there's physical access to it: http://www.offensive-security.com/movies/vistahack/vistahack.html