Startup Locations
Registry paths (go to Run (Windows+R) and type regedit)
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
// HKEY_CURRENT_USER path is use for startup programs work in current user.
// HKEY_LOCAL_MACHINE path is use for startup programs work entire computer.
Startup folder

C:\WINDOWS\Start Menu\Programs\StartUp// Whatever program , shortcut or file in this folder will launch with computer startup.