Microsoft loves Microsoft Teams…and thinks you should, too. Yes, it’s useful, especially if someone you know schedules you for a meeting over Teams. But if booting up your PC and seeing a Teams window immediately pop up irritates you, you can remove Teams without actually uninstalling it.

In fact, you’ll probably kick yourself that you didn’t think of this sooner.

Teams typically opens itself during the startup or boot process of your Windows machine, and that’s the key to removing it. Within the Settings app on both Windows 10 and Windows 11, scroll down to the Apps > Startup menu. You’ll see a list of applications that launch during your PC’s startup process.

Simply switch the toggle switch assigned to “Microsoft Teams” off, and Teams won’t show up during the boot process any more. Presto!

https://www.pcworld.com/article/605084/how-to-stop-microsoft-teams-from-automatically-loading-on-your-pc.html 

https://computerthang.com/blog/address-resolution-protocol-arp/