Before the general release of Windows 8 – Microsoft has released a few important updates for Windows 8 and Windows Server 2012 RTM. Remember if you have running RTM version of Windows 8/2012 your system will be eligible to receive this update.

These updates (*.msu) provide a collection of performance and reliability improvements that are designed to improve the Windows 8 experience. Also you can see some of the built-in applications have received updates. 

As per the Hotfix Knowledge base for this update over here http://support.microsoft.com/kb/2756872 

This cumulative update includes the following performance and reliability improvements:

  • Increased power efficiency to extend battery life
  • Performance improvements in Windows 8 applications and Start screen
  • Improved audio and video playback in many scenarios
  • Improved application and driver compatibility with Windows 8

This update applies to

Windows 8

  • Windows 8 Enterprise
  • Windows 8 Pro
  • Windows Server 2012 Datacenter
  • Windows Server 2012 Essentials
  • Windows Server 2012 Foundation
  • Windows Server 2012 Standard

How to install

You can install this update either using Windows Update in your Windows 8/Server 2012 system.

OR

You can manually download the updates from Microsoft Download Center

Other Updates

Additional articles for reference :

KB – Windows 8 Client and Windows Server 2012 General Availability Cumulative Update

ZDNET – Microsoft delivers Windows 8 updates ahead of Service Pack 1