"People sometimes ask me, "Why do I have to buy security software? Shouldn't the operating system keep nasty programs out?" In a perfect world that might happen, but not in our world. However, Windows 8 brings us just a bit closer to that Utopian ideal. In a test by NSS Labs, its Internet Explorer 10 browser detected and blocked over 99 percent of malicious downloads without any help from a third-party antivirus program."
The full NSS browser test is here:
https://www.nsslabs.com/reports/browser-security-comparative-analysis-socially-engineered-malware
Comment:
Very interesting!
[Edit]: A preview of IE10 for Windows 7 is scheduled for release in November 2012.