The software doesn't just start as a simple application, because it has modules and services that run all together.
You can check for services using Windows + R > services.msc and in registry editor accessible with Windows + R > regedit under
HKEY_LOCAL_MACHINE > Software.
Also, you can install CCLeaner and check the Startup section for a more in-depth analysis. CCLeaner is able to detect various startup modes for any of the application installed that is configured this way.