A report from NSS Labs has found that security software from major vendors takes an average of two days to block new malware.

"NSS Labs developed a test that mimics how average people browse the Web, finding potentially malicious Web sites and then visiting them with a Web browser," writes Computerworld's Jeremy Kirk. "They then record how and when -- or if at all -- security software block the threats."

"Some security software vendors employ reputation systems in order to detect a malicious Web site, which usually involves checking a database of blacklisted Web sites," Kirk writes. "Those systems, however, are not widely used and are immature, NSS Labs said. Overall, it took vendors an average of 45.8 hours to block a site, if it was blocked at all, according to the report."

Click here to read the Computerworld article.