If you are or will be running SQL Server 2012 or SQL Server 2014 in the near future, then you should be running Windows Server 2012 R2 as your operating system.
If you are already running Windows Server 2012 R2, then make plans to install the latest update as soon as possible. According to Microsoft, “Future updates as of the patch Tuesday in May, including security fixes, will be based on Windows Server 2012 R2 Update as the baseline.”
