The MOST secure Windows OS called Vista, which sounds just like what they said about NT4, NT5^H^H^HW2K, WXP, W2K3 server... etc, once taking the Blue Pill is done for.
Of course, of course, here is the crux:
Reportedly, in order to check the vulnerability of Windows Vista, Microsoft had handed over its test versions to 3,000 researchers in the conference and asked them to try hacking it. A researcher, Joanna Rutkowska, from Coseinc, a Singapore-based security firm, showed how it is possible to bypass security measures in Vista that prevents unsigned code from running.
HAHA, there goes that Trusted Computing blah blah blah... the virtualization used by Vista is broken badly.