Hello I had the same issue and finally found a work-a-round.
Going into the registry to fix it was useless. My hotkey was already set to 2. A waste of time. (at least for me.) Other solutions offered were also a waste of time. I finally found a work around to kill it for good, removing it from your task manager.
Go to youtube video: How to Remove and Block Weather, News and Interests Widget from Taskbar on Windows 10
He gives instructions on how to use your firewall, to block taskbar search
And this stops News and Interests from appearing in your task manager and hogging memory, Something Microsoft should have done in the first place!
Big thanks to GMODISM