Sets bthserv to Manual. Only affects Bluetooth — wired and USB-dongle mice/keyboards are unaffected. Set to manual if you don't pair Bluetooth devices; it starts on demand if you do. 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-hardware/drivers/bluetooth/