Close

Close may refer to any of the following:

In general, close is the action performed to terminate a program or exit a file. If a file has changed since it was opened, and the program is closed, any changes to that open file may be lost unless they are saved before closing. If the program closes without performing the close action, this is usually referred to as a crash.

Tip

Press the keyboard shortcut key combination Alt+F4 in Windows to close a program or an Internet browser along with all its tabs. If the program has any open windows, files, or tabs, press Ctrl+F4 or Ctrl+W to close them one at a time and keep the program open.

How to close Windows or another operating system

If you're done using your computer, you can shut down the computer to close everything and have the computer turn off.

How to close a program that is not responding

If a program is frozen or not responding, see our what should I do when a computer freezes page for further suggestions.

When referring to a button or GUI operating system feature, the close box or close button exits a window in a program or the entire program. For example, in most operating systems and software programs, the close button (denoted by an "X") is located in the top-right corner of the window.

Example of a close button

If there are multiple windows or tabs open in a program, clicking the "X" at the top-right corner closes the program and all associated documents, files, tabs, or windows. Clicking any "X" below the top-right corner "X" closes the document, file, tab, or window in the program, but not the entire program. In the image below, the program close button is a red box, with another X for the Document1 tab. Clicking the X for the Document1 tab closes the document window, but leaves the TextPad program open.

Close button for Apple computer users

On Apple macOS, the close button is represented as a red button in the top-left corner of the window, as you can see in the image.

What if the close button is missing?

The close button may

be hidden if the program is running in fullscreen or is a program that has decided to hide the close button (e.g., Windows 8 programs). Try moving the mouse to the top of the screen to see if the hidden close button reappears. If this does not work, try pressing the Esc key. If none of these suggestions work and you are running Windows, you can also use the keyboard shortcut Alt+F4 to close any Windows program.

What is an Operating System? » Computer Shortcut Keys and their Functions » Keyboard Function Keys » Computer Basics - Hardware - Software - Parts

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