Sets ConnectedSearchUseWeb = 0 under Policies\Microsoft\Windows\Windows Search. Stops the Start-menu search box from sending what you type to Bing and showing web/Bing results mixed in with your local apps and files. Local search gets faster and quieter (no per-keystroke web round-trip), and your search queries stop leaving the machine. Reversible.
MaxTweaks applies this tweak with one click and snapshots your original setting first, so you can revert it cleanly at any time. A System Restore point is offered before batch changes, and every tweak links to its official source.
Get MaxTweaksOfficial documentation: https://learn.microsoft.com/en-us/windows/client-management/mdm/policy-csp-search