I'm running the Windows 10 April 2018 Update with Cortana enabled. Suddenly this morning there is a small earth/globe icon on my lock screen with the words: "Watch. Play. Connect.". There is another one of these icons on the top left of my lock screen showing: "Check out the most intense plays of the hottest games.".
When I click either of these icons, it opens up my browser to mixer.com. I have never used this service, don't stream games and don't play online games.
I have not installed any software recently so am confused as to where this came from. I do have an Xbox One and a Windows Phone of which all are connected via the same Live account.
I have "Windows spotlight" set as my background but thought that only gives a you nice new background picture every day?
Any ideas where this spam is coming from?