The fastest way to close an app depends on what's frozen

If an app is responding normally, close it the way you close any window: click the X button in the top corner. On Windows, that's the top right. On Mac, it's the top left. The app shuts down and stops using your computer's memory.

If an app is frozen and won't respond to clicks, you need to force it closed instead. This tells your operating system to stop the app immediately, even if it's stuck. The steps are different on Windows and Mac, and the process takes about 30 seconds.

Closing apps matters when one is using too much of your computer's resources, making everything else slow, or when an app has crashed and won't let you do anything else. You don't need to close apps constantly — modern computers handle multiple running apps fine — but knowing how to force-close a stuck one keeps you from having to restart your whole computer.

Key Takeaways

  • Click the X button to close an app normally; on Windows it's top right, on Mac it's top left.
  • If an app is frozen, use Task Manager on Windows (Ctrl+Shift+Esc) or Force Quit on Mac (Command+Option+Esc) to shut it down immediately.
  • Force-closing an app won't harm your computer, but you will lose any unsaved work in that app.
  • If the same app freezes repeatedly, restarting your computer or reinstalling the app usually fixes the problem.

Closing an app normally on Windows

Click the X button in the top right corner of the app window. The app closes and stops running. Any work you saved stays saved; any work you didn't save is lost.

If you have multiple windows of the same app open, closing one window closes only that window. The app keeps running in the background. To close the app completely, close all its windows, or right-click the app's icon in the taskbar (the bar at the bottom of your screen) and select "Close all windows."

Closing an app normally on Mac

Click the red circle button in the top left corner of the app window. The window closes. On Mac, closing the last window of an app usually closes the app too, but not always — some apps keep running in the background even after you close their windows.

To make sure the app is fully closed, click the app's name in the menu bar at the top of the screen, then click "Quit [App Name]." This closes the app completely and stops it from running in the background.

Force-closing a frozen app on Windows

Press Ctrl+Shift+Esc on your keyboard. Task Manager opens immediately. Look for the app you want to close in the list — it may say "Not Responding" next to its name if it's frozen.

Click the app's name once to select it, then click the "End Task" button in the bottom right corner of Task Manager. The app closes in a second or two. You can then close Task Manager by clicking its X button.

If you can't find the app in the list, or if Task Manager itself won't open, restart your computer. Press and hold the power button on your computer for 10 seconds until it shuts down completely, then press the power button again to turn it back on.

Force-closing a frozen app on Mac

Press Command+Option+Esc on your keyboard. The "Force Quit Applications" window opens. Look for the app you want to close in the list — frozen apps usually show "(not responding)" next to their name.

Click the app's name once to select it, then click the "Force Quit" button. The app closes immediately. Close the Force Quit window by clicking the red button in the top left corner.

If Force Quit won't open, or if the app is still running after you force-quit it, restart your Mac. Click the Apple menu in the top left, select "Restart," and click "Restart" again in the dialog that appears.

Why an app might freeze and stop responding

An app freezes when it runs into an error it can't recover from, or when it's trying to do something that takes longer than expected and stops responding to your clicks. This is different from the app being slow — a slow app still responds when you click, but a frozen app ignores all your input.

If an app freezes once, force-close it and move on. If the same app freezes repeatedly, try restarting your computer first — this clears out temporary files the app may be stuck on. If it still freezes after a restart, uninstall the app and reinstall it fresh. Go to Settings > Apps on Windows, or Applications folder on Mac, find the app, and remove it, then download and install it again from the official source.

What happens to your work when you force-close an app

Any work you saved before the app froze stays saved. Any work you did after the last save is lost — the app didn't get a chance to write it to disk. This is why saving your work often, even in apps that auto-save, protects you if something goes wrong.

Force-closing an app does not damage your computer or your files. It simply stops the app from running. The next time you open the app, it starts fresh. Some apps have a recovery feature that reopens the files you had open when it crashed, but this is not may provide.

Frequently Asked Questions

Will force-closing an app hurt my computer?

No. Force-closing stops an app from running, but it doesn't damage your operating system or your hardware. You will lose any unsaved work in that app, but your computer itself is fine.

Why is my app frozen but Task Manager or Force Quit won't open?

If your entire computer is frozen and nothing responds, restart it. Press and hold the power button for 10 seconds until it shuts down, then press the power button again to turn it back on. This forces your computer to stop everything and start fresh.

Can I close multiple apps at once?

Yes. In Task Manager on Windows, hold Ctrl and click each app you want to close, then click "End Task" once. On Mac, you can force-quit one app at a time in the Force Quit window, but you can open the window again after each one closes.

Do I need to close apps to save battery or speed up my computer?

Closing apps you're not using does free up memory and can make your computer slightly faster, but modern computers manage this automatically. Close an app only if it's frozen, using too much power, or you simply don't need it open anymore.

What if an app keeps freezing even after I reinstall it?

The app may need an update, or your computer may not have enough free storage space. Check for updates in your app store or the app's website. If your hard drive is nearly full, delete files you don't need or move them to an external drive, then try the app again.