Changing the size of or hiding Search box in Windows 10
The search box on the taskbar can either be shrunk to an icon or completely hidden. In both of these cases, the search box will reappear when you press the windows key or the start button, allowing you to type to enter your search. To change the setting, please do the following:
Right-click on the taskbar
Mouse over “Search”
The settings for “Disabled”, “Show search icon” and “Show search box” can be found here.