Microsoft broke local search completely on latest Windows 10 updates if you've ever tried to block Cortana. They count this as a non-issue because from their po

Microsoft broke local search completely on latest Windows 10 updates if you've ever tried to block Cortana. They count this as a non-issue because from their point of view you're not supposed to block Cortana/web search. I've hated this "just block it" mentality around Windows 10 from day one because it was obvious to me it would be a losing game for the user in the long term. You can't fight the software developer forever on this and with each update they send. Eventually if they really want that tracking feature they're going to integrate it into some other core feature that will stop working if you try to disable the tracking.