Startup programs are found in Windows 10 in the Settings app. To access them, open Settings (click the Start button and select the cog wheel icon) and then go to Apps > Startup. Here, you can select which applications will launch when you start your computer.
To add a new application to the Startup folder, open File Explorer, locate the application's executable file and right-click it. Select the “Create Shortcut” option. Now, search for the Startup folder in Windows 10 (by typing "shell:startup" in the File Explorer search box) and paste the shortcut there. The next time you start your computer, the program will start automatically.
Additionally, you can manage which startup programs are enabled or disabled in the Task Manager. To open the Task Manager, press Ctrl+Shift+Esc or right click your taskbar and select “Task Manager.” Once it is open, click the “Startup” tab, select an application and click the “Enable” button to make it start automatically when you restart your computer.
If you’re looking for more detailed information about managing startup programs in Windows 10, you can check out this article from Microsoft (https://support.microsoft.com/en-us/help/4026268/windows-change-startup-apps-in-windows-10).