I have a search box in the Start10 search menu, but it can't find files outside of the standard libraries. Then I realized that there's a feature to add the Start10 search in place of the Cortana search, so I thought I'd try that out. In the Configurations, I checked off the "Replace Start10 search with Cortana search" and then the search that was in my menu went away. It's not there anymore.

Also, I have the option checked off that says "Search should include files outside the standard libraries." Before the Start10 search disappeared, it could not find any files on my external hard drive.