Microsoft is not a heatless giant. Looking at ransomeware problem, Microsoft issues a security update (patch) even for unsupported Windows XP operating system. If you are using Windows XP, please go visit following page and update your system. http://www.catalog.update.microsoft.com/Search.aspx?q=KB4012598&ranMID=24542&ranEAID=TnL5HPStwNw&ranSiteID=TnL5HPStwNw-PIMVxmFIxWiMGPl2SX5mpg&tduid=(b07204fb7f4b46cafc54a796a81d21bb)(256380)(2459594)(TnL5HPStwNw-PIMVxmFIxWiMGPl2SX5mpg)()