For some strange reason, the Cortana “Ask me anything” search box in the Taskbar may turn white suddenly without even the user clicking on it. This may have to do with Microsoft’s server settings and not a problem with your Windows 10 settings. Also, the search box registry tweak (WhiteSearchBox
registry key) may prove ineffective as it works only for the current login session.Read more
Fix: Start Menu Cortana Search Not Finding Apps – Search Results Blank
When you use Cortana search to find an installed program, the program may not appear in Start menu search results although the shortcut exists in the Start menu folder. For example, with Word 2016 installed and its shortcut present in the Start menu folder, when you type in “word”, the search results will display WordPad … Read more