“How do I close Metro-style applications in Windows 8?”
Apps in Windows 8 don’t slow down your PC, so it’s not necessary to close every single app. Windows 8 will have the app ready in the background and eventually close it if its not being used. However if you still want to get rid of the app, here’s how:
Method 1: Click and drag the top of the app to the bottom of your screen to close the app.
Method 2: Closing the app thumbnail. Right-click on the app and select “Close”.
Method 3: While inside the app press ‘ALT+F4’ at the same time.
Method 4: Press ‘ALT+CTRL+DELETE’ at the same time and ‘End Task’.