I've disabled all options in the settings I can find for Cortana - just like I did for the kids' Windows 10 laptops and none of the laptops have this stupid oversized cortana search box open when you click on the search bar.
I hate Cortana as much as I hate Bixby on my Samsung S8 (shitty software, bloated and intrusive). I won't purchase another Samsung phone until they stop using Bixby or at least don't force it to be used (actually give users a way to turn it off completely).
I went in here and found under SafeSearch - was set to Moderate.
In the same area for Permissions & History > Cloud content search: Microsoft account and Work or School account were set to on. I set both to off.
Under the Permissions & History > History: Search history on this device was set to on. I set this to off.
This seems to have resolved the news crap showing up if I clicked on the search bar, but the stupid oversized Cortana Search box is still there.....I don't know if it's a feature from some recent Windows update, but it sure is ugly. I can deal with that box, I just didn't want random things being shoved at me.
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I also went and added this in the registry for good measure.
I went through all the settings to make sure anything that says Cortana on it was disabled or set to off.
I guess I see if things stay or if the forced news/weather/app feeds show up.