<A target="_blank" href="http://www.networkworld.com/news/2011/012111-twitter-targeted-with-fake-antivirus.html?source=nww_rss">A fake security program called "Security Shield" is being "marketed" through Twitte</A>r using a URL shortener to mask the real address. This article includes a link to directions for un-installing the fake anti-virus program.