Press Windows + I to open Settings. Go to Apps > Installed Apps. In the search bar, type Cortana. When Cortana appears in the list, click the three-dot menu beside it. Select Uninstall and confirm ...
Press Ctrl + Shift + Esc to open Task Manager. Click the Startup Apps tab. Find Microsoft Teams in the list. Right-click it and select Disable. This stops Teams from launching when Windows starts.
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