Autoruns Portable is a Portable version of Sysinternals Company is sort of like the MSCONFIG utility in Windows, only much more powerful. Autoruns Portable displays and manages all the stuff that starts when a PC boots up: All the programs, services, Explorer shell extensions, browser objects, Winlogon notifications, and more. It lists programs Beside Eachother, including not only those in your startup folder, but also Run, RunOnce, and other Registry keys. It allows separate access for Windows Administrator Users (including NT Authority for System, Local Service, and Network Service).
Autoruns Portable can delete or disable entries (disabled entries are saved in a special folder) to prevent them from loading when you reboot. Experience, knowledge, and care (plus good backups) are recommended when using this powerful tool.