The best software to control every program that is loaded automatically when Windows starts is Autoruns by Sysinternals. While this is an excellent software it requires some knowledge to use it the way it was meant to be used. A similar free software that is way better suited for novice computer users is the program Startup Control Panel by Mike Lin. It looks like a crippled version of Autoruns and concentrates on the most used locations where programs are added to be started with Windows.