QuoteMicrosoft this week made good on a 2014 promise and withheld security updates from users of older versions of the company's Internet Explorer (IE) browser.
All Windows users still running IE7 or IE8, and those running IE9 on any other edition of Windows but Vista, as well as those using IE10 on anything but Windows Server 2012, did not receive the patches Microsoft distributed Tuesday to systems equipped with the newer IE11 or Edge browsers.
http://www.pcworld.com/article/3032562/browsers/its-official-older-versions-of-internet-explorer-are-now-at-risk.html
Support for older versions of Internet Explorer ended on January 12th, 2016: https://www.microsoft.com/en-us/WindowsForBusiness/End-of-IE-support
Quote In addition to killing off older versions of IE, today is also the last day for Windows 8 support, which will also no longer receive security patches and other updates following today’s final Patch Tuesday for the OS. That means Windows 8 users will need to upgrade to Windows 8.1 or Windows 10, in order to continue to protect their PC from security risks.
http://techcrunch.com/2016/01/12/microsoft-today-ends-support-for-windows-8-old-versions-of-internet-explorer