5
There are two ways:
Other solutions you may come across are outdated and patched and will not work now, or they require you to not use Spotlight. Namely,
-2
settings, personalization, lock screen, turn off "get fun facts...from cortana on your lock screen"
-3
Just to add to this - Go to Settings > Personalisation > Lock screen >
Under 'Background' select: 'Picture'.
Turn off: 'Get fun facts, tips and more from Windows and Cortana on your lockscreen'.
The only way to see that setting above is to have 'Picture' selected. You can then change the Background back to Slideshow or Windows Spotlight if you choose.
1question asks about removing text without changing from spotlight. – Máté Juhász – 2018-05-11T09:39:15.053
1I don't see that on my instance. It might be super useful to add a screenshot of this specific settings page. – Journeyman Geek – 2018-04-29T05:34:10.357
This option has been removed as of winver 1803. Not sure in which update though. – kdb – 2018-12-28T07:32:44.653