is there any reason NOT to believe this article The Roof Is on Fire: Tackling Flames C&C Servers (just below the Operating Systems pie chart) that Win7 64bit users are immune?

Security is NOT one dimensional problem/task. Very few operating systems are exposed directly to Internet. Analyze every information and compare described conditions and yours. Follow recommendation of reliable sources. Regards Milos

Hi, Since the website is not hosted by Microsoft, Microsoft does not guarantee the accuracy of this information. Regarding the security, you can refer to following article. Windows 7 Security Enhancements Windows 7: Explore new and improved security features. Hope this helps Vincent Wang TechNet Community Support