How do I close Apps?
Windows will leave an app running in the background after you start it. If you do not use the app for a while, Windows will close it. You can manually close an app using one of the methods listed below.
Click the red X in the top right corner of the App.
Tap your screen at the top or the App and drag it to the bottom of the screen.
For more information on closing Apps in Windows 10, visit the Microsoft support site.