You can close individual Excel workbook windows or close all workbook windows and exit Excel.
How to close an app or game on Xbox. | Xbox Support
To close a document, select the File tab and select Close. To close Word, select X Close in the upper-right corner.
This article provides the steps on how to close a Microsoft account and explains the risks and impact associated with closing an account. Risks and impact of closing a Microsoft account
Close the game. In the search box on the Windows taskbar, type and then select Task Manager. Select More details. In the list of running processes, select the Broadcast bar server (bcastdvr.exe) process (if it's still there), and then select End task. Restart your game and try recording again.
When you’re ready to make your PC sleep, just press the power button on your desktop, tablet, or laptop, or close your laptop’s lid. On most PCs, you can resume working by pressing your PC's power button.
To force an app to close, do the following: On your iPad or iPhone, press the Home button twice. This shows all the apps that are currently open. Swipe left or right to find the app you want. Swipe the preview screen up to close it. This example shows PowerPoint being closed.
Unwanted pop-up windows can sometimes be tricky to close and may even cause your browser to stop responding. If you have a persistent pop-up window giving you problems, here's how to use Task Manager to close it: