Shell:startup

In Windows 10, type this to open the startup folder, “shell:startup”
C:\Users\RichA\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup

How To Set Up a Second Monitor in Windows 8.1

From How To Set Up a Second Monitor in Windows 8.1

Press the Windows icon and the letter "P" on your keyboard at the same time. This will take you directly to the Second Screen options. Like on Step 4, click "Extend" to enable the external monitor.