Applies To
Windows Server 2012 R2 Datacenter Windows Server 2012 R2 Standard Windows Server 2012 R2 Foundation Windows Server 2012 R2 Essentials Windows 8.1 Enterprise Windows 8.1 Pro Windows 8.1 Windows RT 8.1

Introduction

This update is a cumulative update that includes the security updates and the non-security updates for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 that were released before March 2014. In addition to previous updates, it includes features such as improved Internet Explorer 11 compatibility for enterprise applications, usability improvements, extended mobile device management, and improved hardware support. Important All future security and nonsecurity updates for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 require this update to be installed. We recommend that you install this update on your Windows RT 8.1-based, Windows 8.1-based, or Windows Server 2012 R2-based computer in order to receive continued future updates.

Improvements in this update

This update includes the following new features and improvements:

  • Enables a more familiar mouse and keyboard functionality for modern apps and controls.

  • Improves the web application compatibility of the Internet Explorer 8 emulation mode in Internet Explorer 11 F12 Developer Tools.

  • Improves performance and reliability when you use multi-display configurations for portrait-first device experiences.

Issues that this update fixes

This update package fixes the issues that are documented in the following Microsoft Knowledge Base articles.