What to do when your computer stops responding
A frozen computer usually means the operating system or a single program has stopped accepting input — your keyboard and mouse do nothing, or only one process is locked while the rest of the system works. The fix depends on which one it is. If only one program is frozen, you can close it without restarting. If the whole system is frozen, you have three options in order: wait a few seconds, force-close the frozen program, or restart the computer.
Most freezes last only a few seconds and resolve on their own — the system is processing something heavy in the background. If nothing changes after 30 seconds, move to the next step.
Key Takeaways
- Wait 30 seconds before taking action, because many freezes resolve on their own while the system processes a large task.
- On Windows, press Ctrl+Alt+Delete to open Task Manager, find the frozen program, and click "End Task" to close only that program.
- On Mac, press Command+Option+Escape to open Force Quit, select the frozen program, and click "Force Quit".
- If the entire system is frozen and will not respond to keyboard shortcuts, hold the power button for 10 seconds to force a shutdown, then restart normally.
- Freezes that happen repeatedly point to a specific program, a driver that needs updating, or a hard drive running out of space — each has a different fix.
Force-closing a single frozen program on Windows
If only one program is frozen but the rest of your computer responds, you can close just that program without restarting. Press Ctrl+Alt+Delete on your keyboard. A menu will appear with several options.
Click Task Manager. A window will open showing all programs currently running. Look for the program that is frozen — it will often have the word "Not Responding" next to its name. Click on it once to select it, then click the End Task button in the bottom right corner. The program will close when ready.
After the program closes, your computer should respond normally again. You can reopen the program if you need it, or leave it closed. If the same program freezes repeatedly, that program may have a bug or conflict with your system — try updating it or reinstalling it.
Force-closing a frozen program on Mac
On a Mac, press Command+Option+Escape together. The Force Quit window will appear, showing all open programs. Look for the program that is frozen — it will have "not responding" written under its name.
Click on the frozen program to select it, then click the Force Quit button. The program will close. Your Mac should return to normal. If you need the program again, you can reopen it from your Applications folder or Dock.
Restarting when the entire system is frozen
If your keyboard and mouse do not respond at all — even Ctrl+Alt+Delete does nothing on Windows, or Command+Option+Escape does nothing on Mac — the entire system is frozen and you need to force a shutdown.
Hold down the power button on your computer for 10 seconds. The screen will go black and the computer will shut down completely. Wait 30 seconds, then press the power button once to turn it back on. The computer will restart normally. This is a hard shutdown and should be your last resort, but it will not damage your computer or files.
After restart, Windows or Mac will check the hard drive for errors and may take longer than usual to boot up. This is normal. Let it finish without interrupting.
Why freezes happen and how to prevent them
Most freezes happen because a program is using too much memory or processing power, or because the hard drive is full and the system cannot write temporary files. A single freeze is usually harmless. Freezes that happen every day, or always when you use a specific program, point to a real problem.
If freezes happen repeatedly, check how much free space is left on your hard drive. On Windows, right-click the C: drive in File Explorer and click Properties. On Mac, click the Apple menu, select About This Mac, then click Storage. If you have less than 10 percent of your drive free, delete old files or programs you no longer use, or move large files to an external drive.
If a specific program always freezes, update it to the latest version — the developer may have fixed a bug. If it still freezes after updating, try uninstalling and reinstalling it. If freezes happen across many programs, your drivers may be outdated. On Windows, open Device Manager (right-click the Start button and select it), look for any devices with a yellow warning triangle, right-click them, and select Update Driver.
When to restart versus when to force-close
Force-closing a program is faster and safer than restarting because it closes only the frozen program and leaves everything else running. Use force-close first if your keyboard and mouse still respond to anything — even if only the Task Manager or Force Quit window opens.
Restart only when the entire system will not respond to keyboard or mouse input at all. A forced restart is safe — modern computers are designed to handle it — but it closes all open programs without saving, so you may lose unsaved work. If you can still move your mouse or type, you have time to save your work before restarting.
What to do if freezes keep happening
A single freeze is not a sign of trouble. Freezes that happen several times a week, or always when you do the same task, mean something in your system needs attention.
Start by checking your hard drive space and updating your programs and drivers, as described above. If freezes continue, the problem may be a program that runs in the background and conflicts with others. On Windows, open Task Manager and look at the Startup tab — programs listed there run every time you start your computer. Disable any you do not recognize or do not need. On Mac, go to System Settings, click General, then Login Items, and remove programs you do not need at startup.
If you have tried these steps and freezes still happen daily, your hard drive may be failing, or your computer may have a hardware problem. At that point, take your computer to a repair shop or contact the manufacturer's support line — they can run diagnostics to check the hard drive and other components.
Frequently Asked Questions
Will force-closing a program delete my files?
No. Force-closing closes the program but does not touch your files. However, any work you did in that program since you last saved will be lost. If you can still access other programs, save your work in them before closing the frozen one.
Is it safe to hold the power button and force a shutdown?
Yes. Modern computers are designed to handle forced shutdowns without damage. Your files will not be deleted. However, any unsaved work in open programs will be lost, and the restart may take longer as the system checks the hard drive. Use it only when the keyboard and mouse do not respond.
Why does my computer freeze every time I open a specific program?
That program may have a bug, may be outdated, or may conflict with another program on your system. Update it first. If it still freezes, try uninstalling and reinstalling it. If the problem continues, the program may not be compatible with your version of Windows or Mac — check the developer's website for system requirements.
Can a virus cause my computer to freeze?
Yes, but it is less common than a program using too much memory or a full hard drive. If freezes started suddenly and you recently visited an unfamiliar website or opened an email attachment, run a full scan with your antivirus software. On Windows, Windows Defender (built in) can do this. On Mac, run Malwarebytes or another reputable scanner.
What is the difference between a freeze and a crash?
A freeze means the computer stops responding but stays on. A crash means the program or system closes unexpectedly. Both can be caused by the same problems, but a freeze gives you a chance to force-close the program, while a crash closes it for you. If your computer crashes repeatedly, the steps above still explore — update programs, check hard drive space, and look for conflicting startup programs.