You can also configure Skype to not start automatically from inside the software itself.
HOW TO STOP SKYPE FOR BUSINESS FROM STARTING AUTOMATICALLY HOW TO
Related: How to Remove the Meet Now Button from Windows 10’s Taskbar Stop Skype from Starting Automatically in Skype Settings Once this is disabled, Skype will no longer launch when you boot your computer. Move the toggle switch to Off to disable Skype as a startup app.
In the Startup list, scroll down until you see Skype.
One way to prevent Skype from launching when you start up your computer is by disabling it as a background app on your system. Stop Skype from Starting Automatically with Windows Settings But if you find your system is bogging down or always seems to suffer from high CPU usage, you’ll want to look at stopping Skype from starting automatically when you launch Windows 10. If you have a powerful enough computer, this may not be an issue. Unfortunately, when you install Skype, it defaults to launching automatically with Windows 10 and running in the background.