AVG Anti-Virus 8.0 Free Searching for certain terms, like warez, will always turn up dangerous sites—hosting illegal downloads is itself enough to merit the red flag. But I had to do a lot of searching to come across sites the utility would flag for some other reason—for example, hosting a Trojan disguised as a video codec. I was surprised to find that Search-Shield stopped me from visiting some of the red-flagged sites—according to the help, that feature is turned off. Thompson explained that AVG free maintains a local database of known bad sites and will block those even though it doesn't run a full analysis of every page you visit.
As AVG's exploit expert Roger Thompson pointed out, sites from search results are potentially the most dangerous you visit. They're often sites you've never accessed before, and you never know where clicking a search link will send you. So by specifically scanning links in search results, AVG can offer truly useful protection against malicious Web sites. AVG's LinkScanner technology analyzes the code on a given Web page looking for drive-by downloads, code to exploit browser vulnerabilities, and other threats. Its analysis happens in real time, so if a normally safe site gets hacked, the utility catches the problem immediately. The converse is also true: If a hacked site gets repaired, LinkScanner gives it a green light. LinkScanner's toolbar installs in both Internet Explorer and Firefox. Its Search-Shield feature checks all search results from Google, MSN, and Yahoo! and inserts an icon identifying the site as safe, questionable, risky, or dangerous.The full AVG suite also includes Surf-Shield, which extends this analysis to every site you visit.
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