I think Mael is correct, the relevant setting in ShutUp10 is under "Miscellaneous" at the bottom - "Extension of Windows 10 search with Bing disabled".

I had the Cortana high cpu issue, seem to have fixed it though I've got no idea how.

I re-enabled all the Cortana stuff (I'd disabled it using ShutUp10), restarted and waited to see if it would...