The security bulletins for October were not the only updates that Microsoft has released today. The Update for Windows 8 for x64-based Systems (KB2756872) has been released for Windows 8 and Windows Server 2012 operating systems on the same day. The cumulative update improves the performance and reliability of the Windows 8 and Windows Server 2012 operating system.
In particular, it improves the power efficiency of the operating system to extend battery life, the performance when working with apps or the start screen, audio and video playback, as well as application and driver compatibility. The update is being made available as an optional update, which means that you need to download and install it manually on the system.
With that said, it is offered on Windows Update but you need to select it by yourself to install it. To do that follow the steps outlined below:
You can alternatively download the 160 Megabyte download from Microsoft's Download Center.
Please note that you need to restart your system to complete the installation of the update.
You may ask yourself why the update has been made available prior to general availability of the operating system. According to Steven Sinofsky, Microsoft uses the time between releasing the RTM version of a new operating system and general availability of it to work with partners to make sure new or enhanced components work well with the operating system. It can happen that these components require that changes or improvements are made to Windows, and this appears what has happened here.
Previously, those updates were released with the first service pack of the operating system. With Windows 8, they are released before the service pack, and in fact before the actual operating system is released. (thanks Ilan)
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