(May 11, 2007)  Google research finds 10 percent of web pages contain malicious code.  Google closely analyzed 4.5 million web pages over the course of a year and found that approximately ten percent, or 450,000, had the capability of installing malware without users' knowledge. An additional 700,000 pages are believed to be infected with code that could harm users' computers. The company says it has "started an effort to identify all web pages in the Internet that could be malicious."

Most of the web pages entice users to visit the dangerous pages through tempting offers, and exploit holes in Microsoft Internet Explorer (IE) to install themselves on users' computers. Google also examined the vectors used by attackers to infect these web pages; most malicious code was located in elements beyond the control of website owners, such as banner advertisements and widgets.