Winnie the Pooh and Tweety stand ready to wreck havoc on your computer. According to a survey released by security company McAfee's SiteAdvisor, online searches for even the most innocuous terms can be dangerous to your PC's health. For example, the terms found in the Google Zeitgeist category of "childhood favorites"--including "Winnie the Pooh" and "Tweety"--turned up risky sites in 6.7 percent of search results. The survey, which updates one conducted in May, <A HREF="http://news.zdnet.com/2100-9588_22-6142610.html?tag=nl.r23660">evaluates the safety of search results</A> returned by the top five search engines: Google, Yahoo, Microsoft's MSN, Time Warner's AOL and Ask.com. McAfee SiteAdvisor compiled a list of 2,500 popular keywords and evaluated the first five pages of search results for each keyword, analyzing them for malicious content.