Open the application’s settings and disable “Launch at startup,” “Open at login,” or “Start with Windows/Mac”
Windows: open Task Manager, go to the Startup tab, and disable the app
Windows: open Settings, go to Apps, then Startup, and turn the app off
Windows: check the app’s own preferences for startup options and turn them off
Mac: open System Settings, go to General, then Login Items, and remove the app
Mac: check the app’s preferences for a “start on login” option and disable it
Linux: remove the app from Startup Applications or autostart settings
Linux: check your desktop environment’s session or startup settings and disable the app
Delete the app’s shortcut from the Startup folder on Windows
Restart the computer to confirm the app no longer opens at startup