The actual updates…
Windows Update Client for Windows 7 and Windows Server 2008 R2: July 2015
Windows Update Client for Windows 8.1 and Windows Server 2012 R2: July 2015
After Update installed add / edit group / local Policy in the following location…
To block the upgrade by using Computer Configuration, follow these steps:
Click Computer Configuration.
Click Administrative Templates.
Click Windows Components.
Click Windows Update.
Double-click Turn off the upgrade to the latest version of Windows through Windows Update.