Step 1) go to the taskbar on the desktop computer and Right tick on it, and select “Task Manager” at the drop-down menu
Step 2) at the bottom right side of the window, tick on the “more details” down arrow circle.
Step 3) tick on the “startup” tab, and search for and highlight “Microsoft Teams”, then tick on the “disable” box on the right bottom corner.
Final Step 4) Exit out of the Task Manager window.