After login, a number of windows such as Desktop, Downloads, and Pictures opens automatically. When I try to close them one by one closes itself but last one opens all indicating starting file manager in lower panel/status bar.

After login all the windows such as desktop,download,home opens automatically when i try to minimise them all minimise. when i try to close them one after another they disappears but not last one which closes itself and reappear along with other indicating message starting file manager in status bar. ( it seems that there are a number of open nautilus windows at startup upon login, and when the user tries to close them, nautilus crashes and tries to restart)