Following the recent Microsoft official announcement Microsoft Security Bulletin MS16-137, This security update resolves vulnerabilities in Microsoft Windows. The more severe of the vulnerabilities could allow elevation of privilege.
For further reference about the vulnerabilities:
(A) What Do You Need To Know About This Update?
kindly refer to the official announcement by Microsoft:
(B) How to get an update through Windows Update
This following article describes how to obtain updates from Windows Update in Microsoft Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 R2 and Windows Server 2008
(C) Recommended preparation
We recommend all users to run a full data backup for their web files and databases to their local desktop/laptop/external drive before any server reboot.
Last but not least, please note that all Managed services clients will be notified privately on the Windows update arrangement.
Those unmanaged services client who is interested on this update may contact support team by submitting a ticket at https://support.exabytes.com/support/tickets/newthen choose Technical Support (Dedicated Server / VPS / Cloud / Colocation)