Win10 system will change the search button into the search bar. Do not click the search button again.

Note: This function is only suitable for the latest Win10 preview version 9879
Setting steps:
1, press WIN+R to bring up the running dialog box, then enter Regedit Enter;
2, and then expand HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows/CurrentVersion/Search
Some users open without Search item, then we can create a new item in CurrentVersion;
1. Enter regedit in the Start menu search bar or “Run” and press Enter to open the Registry Editor.
2, find the following keys:
HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows/CurrentVersion/Search (if there is no search item, right click on the CurrentVersion to create a new item, rename it to Search)
3, create A new DWORD value, named EnableSearchBox and set the key value to 1. If there is currently this key value, change its value from 0 to 1

4, exit after the registry modification is completed, and then log out of the win10 system, then we will get it, we can see that the search button is gone. Instead, it is a search box.

Of course, if you feel that the search box doesn't feel good, or if you feel too much of the taskbar, you can change the value of EnableSearchBox back to 0 to achieve the recovery effect