Windows 10 users can now integrate the Everything search engine directly into the Windows taskbar using the new ‘EverythingToolbar’ application. This field displays instant search results from the Everything index, includes keyboard shortcut navigation, customizable ‘Open with..’ commands, and supports light/dark/medium themes. The Everything Toolbar is a great additional tool that makes it even easier to use the search engine in Windows 10. Users can compile the EverythingToolbar from the source code, or download a precompiled version directly from the project’s GitHub page.
Source: https://www.bleepingcomputer.com/news/microsoft/how-to-integrate-everything-search-in-the-windows-10-taskbar/