In the PC app, go to Menu > Preferences > Show Advanced Settings > Startup and Window Behavior and turn this feature off. You can also stop Spotify from opening on startup by editing Windows startup programs. Press Ctrl+Shift+Esc to open Task Manager > choose the Startup tab > highlight Spotify on the list > and click Disable.
Add a Startup Item. Get to the Users & Groups window. Click the Apple logo from the top-left corner, go to System Preferences, and click Users & Groups. This opens the Users & Groups window. From here you can add or remove new users or groups, change password for the users, change users’ profile picture, etc. Get to the Login Items tab.
Follow the below steps: Step 1: Open the task manager using the shortcut Ctrl+Shift+Esc. Click on the Startup tab. Step 2: Look for the Discord app from the list and select it by clicking on it. Step 3: Click the button that says Disable on the bottom right. Alternatively, you can disable the startups of any other app.