One of the most pertinent changes to Windows 10 is how updates are being installed. Unless your computer is using WSUS or some other corporate solution, you do not have the ability to select which updates to install and which not to install. This includes drivers and feature updates (such as the Anniversary Update). While it is usually recommended to install all updates, sometimes it is not wanted, e.g. because of system instability, or simply, because you don't want a particular update (e.g. Anniversary Update). To meet customer's demand, Microsoft has released a tool to reintroduce the "hide an update" function of older Windows versions.
The tool allows you to "hide" specific updates, preventing from being installed. It also can "unhide" updates if ever you decide to install the hidden updates again.
Instructions and download can be found here: https://support.microsoft.com/kb/3073930