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Autoruns shows you what programs are configured to run during system bootup or login, and shows you the entries in the order Windows processes them.

It is useful to find auto launced applications and disable them to launch on boot time.
You can configure Autoruns to show other locations, including Explorer shell extensions, toolbars, browser helper objects, Winlogon notifications, auto-start services, and much more.

Is also included in the download package, a command-line equivalent that can output in CSV format called Autorunsc.

You'll probably be surprised at how many executables are launched automatically!