You can't make this shit up: Microsoft's Jim Allchin is claiming that Vista's new lockdown features are so capable and thorough that he is comfortable with his own seven-year-old son using Vista without anti-virus software installed. I wouldn't be so sure - being this cocky is just inviting hackers to find great big holes. Oh and I don't think many 7 year old boys are responsible for large corporate infections.
Update: Yeah-but-no-but... It seems Jim has changed his mind and Symantec and McAfee won't be going out of business after all.