you know the computer thing is it plugged in?
Transcript
A windows dialogue saying "Select an app to open this 'msteams' link. The suggested apps are Microsoft teams, with a "new" subtext, and MicroSoft Teams, with the word new in its icon.
Couldn't this be the web version fighting the installed application?
Don't think so, this screenshot looks older to me and was probably taken during the transition to the Teams rewrite, Teams (new). So the user has both old and new Teams installed, which was a common occurrence as you could switch between them with a toggle button.