Unlike other Windows versions such as Windows 7 or Windows 8, with Windows 10 build 9266 the search bar occupies a large area on the Taskbar. To hide or minimize, you can do as follows:
Windows 10 – Customize the search engine on the Taskbar
Right click on the bar Taskbar —> Search
Here you can hide them by selecting Disabled or to collapse them, you choose Show search icon.
So with just a few mouse clicks, you can customize the search engine Search on the Taskbar. Hope to help you in the process of use.