Windows Spotlight works with the Lock Screen background and can sometimes make unwanted "suggestions". Click on Start-Settings-Personalization-Lock Screen. Once there, in the "Background" section, see if "Windows Spotlight" is listed below the lock screen picture. If so, use the drop down arrow to select "Picture".
Hope this helps.
Despite my best efforts I continue to get "try the browser recommended" "discover microsoft edge" notifications on my lock screen when I log in. I don't like Edge or IE. I went so far as to block them inbound and outbound in my firewall. But these spam ads keep showing up.
I have gone into Settings Notifications and disabled Windows Suggestions Tips and Tricks. That didn't work.
So I disabled all notifications for apps one by one and then turned off "Get notifications from apps and other senders". I still get them.
I am at wit's end on how to kill these notifications. Any ideas or suggestions?