McAfee SiteAdvisor

McAfee SiteAdvisor protects us from all kinds of Internet security threats like spyware, browser exploits, adware, spam, viruses and online phishing scams. The automated testers continuously the Web to browse sites, download files, and sign-up for things with e-mail addresses. As you search, browse, download, or register online, SiteAdvisor's safety ratings help you stay safe and immune from the online threats.It is not actually an antivirus but protects you from malicious sites.

The official blog for McAfee SiteAdvisor is as under
http://blog.siteadvisor.com/

Download it from the Site http://www.siteadvisor.com/