Microsoft is trying to get all users onto the latest versions of Internet Explorer for their platform, and here's an update covering the versions and platforms.
"For customers not yet running the latest browser available for your operating system, we encourage you to upgrade and stay up-to-date for a faster, more secure browsing experience. Beginning January 12, 2016, the following operating systems and browser version combinations will be supported:"
|Windows Platform ||Internet Explorer Version |
|Windows Vista SP2 ||Internet Explorer 9 |
|Windows Server 2008 SP2 ||Internet Explorer 9 |
|Windows 7 SP1 ||Internet Explorer 11 |
|Windows Server 2008 R2 SP1 ||Internet Explorer 11 |
|Windows 8.1||Internet Explorer 11 |
|Windows Server 2012||Internet Explorer 10 |
|Windows Server 2012 R2||Internet Explorer 11 |
"After January 12, 2016, only the most recent version of Internet Explorer available for a supported operating system will receive technical support and security updates. For example, customers using Internet Explorer 8, Internet Explorer 9, or Internet Explorer 10 on Windows 7 SP1 should migrate to Internet Explorer 11 to continue receiving security updates and technical support. For more details regarding support timelines on Windows and Windows Embedded, see the Microsoft Support Lifecycle site."Microsoft Publishes IE Browser Migration Guidance