Photos app opens at startup unexpectedly

Re: "Photos app opens at startup unexpectedly

why does photo app open at startup? it is not in the start ups. list "

Wondering whether you may need to close all open windows in the Photos app, and then "Quit" the app

or

Apple Support's online article Quit apps on Mac - Apple Support may be helpful:

Eg: says:

Tip: If an app has windows open when you quit the app, the windows are shown the next time you open the app. To have app windows close and not be shown the next time you open apps, choose Apple menu  > System Settings, click Desktop & Dock in the sidebar (you may need to scroll down),

go to Windows, then turn on “Close windows when quitting an application”.