This article describes the update that further improves the security of Windows Update (WU) / Microsoft Update (MU) client for Windows 8, Windows RT, Windows Server 2012, Windows 7 Service Pack 1 (SP1), and Windows Server 2008 R2 SP1.
Note Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2 with update 2919355 already include these improvements.
Improvements
This update includes the following improvements:
Further hardening of infrastructure files that are used by WU/MU client
A more secure communication channel between the WU/MU client and service
Update information
How to obtain this update
This update will be rolled out gradually. It will be automatically installed if Automatic Updates is turned on and is either set to automatically install updates or notify to install updates.
This update is unavailable currently for deployment through Windows Server Update Services (WSUS) or as a stand-alone package. When it becomes available, the information will be made available in this article.
Source: Update to Microsoft Update client