Windows Server 2012 R2 with Update

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Windows Server 2012 R2 with Update includes the cumulative updates to Windows Server 2012 R2, as well as “Enterprise Mode” for Internet Explorer 11 and buttons for Search and Power on the Start page in the user interface. The heart of the Microsoft Cloud OS vision, Windows Server 2012 R2 brings Microsoft’s experience delivering global-scale cloud services into your infrastructure with new features and enhancements in virtualization, management, storage, networking, virtual desktop infrastructure, access and information protection, the web and application platform, and more. (More info)

Prerequisites
To apply this update, you must be running Windows 8.1, Windows Server 2012 R2, or Windows RT 8.1.

Resource and training