An antivirus service used by tens of thousands of businesses and millions of home users shut down an untold number of computers around the world after it mistakenly identified core parts of Microsoft Windows as threats, the company confirmed Tuesday. Powered by WPeMatico

From http://www.nbcnews.com/tech/tech-news/popular-antivirus-program-mistakenly-ids-windows-threat-creating-chaos-n750521

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