Server 2012 R2 Update & Windows 8.1 Update is a cumulative set of security updates, critical updates and updates.
Windows 8.1 Update for x86 (KB2919355)
Windows 8.1 Update for x64 (KB2919355)
Windows Server 2012 R2 Update (KB2919355)
Server 2012 R2 Update & Windows 8.1 Update is a cumulative set of security updates, critical updates and updates.
Windows 8.1 Update for x86 (KB2919355)
Windows 8.1 Update for x64 (KB2919355)
Windows Server 2012 R2 Update (KB2919355)