What to do when your computer stops responding
A frozen computer usually means the operating system or a program has stopped responding to your keyboard and mouse. Before you force a restart and risk losing work, try these steps in order: wait 15 to 30 seconds, use Task Manager or Activity Monitor to close the frozen program, then restart if nothing else works. Most freezes are temporary and caused by a single program using too much memory or processing power, not a hardware failure.
The goal is to regain control without losing unsaved files. Forcing a hard shutdown should be your last resort, because it can corrupt files and damage your hard drive or solid-state drive if it happens during a write operation.
Key Takeaways
- Wait 15 to 30 seconds before taking action, because some programs recover on their own during this time.
- On Windows, open Task Manager by pressing Ctrl+Alt+Delete, find the frozen program, and click "End Task" to close only that program without restarting.
- 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 keyboard shortcuts do not work, hold the power button for 10 seconds to force a shutdown, then restart normally.
- After the computer restarts, check what program froze and whether updates or reinstalling it will prevent the problem from returning.
Try waiting and then force-close the frozen program on Windows
When your computer freezes, the first step is to do nothing for 15 to 30 seconds. Programs sometimes pause briefly while they load data or process a large file, and forcing them closed when ready wastes work you may not have saved. If the screen is still frozen after half a minute, move to the next step.
Press Ctrl+Alt+Delete on your keyboard. This opens a blue screen with several options. Click Task Manager. Task Manager shows every program currently running and how much memory and processing power each one is using. Look for any program with the status "Not Responding" — that is the frozen one.
Click on the frozen program to select it, then click the "End Task" button in the lower right corner. Windows will close that program without restarting your computer. If you had unsaved work in that program, it is lost, but everything else on your computer stays open and your other files remain safe.
If Task Manager itself does not open, or if the entire screen is frozen and you cannot click anything, skip ahead to the section on forcing a shutdown.
Force-close a frozen program on Mac
On a Mac, press Command+Option+Escape simultaneously. This opens the "Force Quit Applications" window, which lists every open program. Look for any program with "(not responding)" next to its name.
Click on the frozen program to select it, then click the "Force Quit" button. The program closes when ready, and your Mac returns to normal. Any unsaved work in that program is lost, but other programs and files are unaffected.
If the keyboard shortcut does not work and your Mac is completely unresponsive, move to the forced shutdown step below.
Force a shutdown if the entire computer is frozen
If your keyboard and mouse do not respond at all — meaning Task Manager or Force Quit will not open — the entire operating system is frozen, not just one program. In this case, you must force the computer to shut down.
Hold down the power button on your computer for 10 full seconds. The screen will go black and the computer will turn off completely. Wait 30 seconds, then press the power button once to turn it back on normally. The computer will restart and run a brief check of its hard drive or solid-state drive to make sure no files were corrupted during the forced shutdown.
Forcing a shutdown is safe as long as you do it only when the computer is completely unresponsive. Doing it repeatedly or out of habit can eventually damage your drive, so use this method only when nothing else works.
Restart your computer normally after a freeze
Once your computer is running again, do not when ready go back to work. Take a moment to restart it one more time using the normal shutdown process: click the Start menu (Windows) or Apple menu (Mac), select Shut Down or Restart, and wait for the computer to power down and come back up on its own.
A normal restart clears temporary files from memory and gives your operating system a fresh start. Many one-time freezes do not return after a normal restart. If the same program froze your computer, note which one it was — you will need that information for the next step.
Check for updates and reinstall the program that froze
If a specific program caused the freeze, the first thing to try is updating it. Open the program and look for a menu option like Help or Settings, then search for "Check for Updates" or "About". If an update is available, install it and restart your computer.
If updating does not stop the freezing, uninstall the program completely and reinstall it fresh. On Windows, go to Settings > Apps > Apps & Features, find the program, and click Uninstall. On Mac, open Applications in Finder, drag the program to the Trash, and empty the Trash. Then read and install the latest version from the program's official website.
If the program continues to freeze after reinstalling, it may not be compatible with your operating system version, or your computer may not have enough memory to run it. Check the program's system requirements on its website to see if your computer meets them.
Check your available storage and memory
A computer that freezes frequently may not have enough free space on its drive or enough memory (RAM) to run your programs smoothly. On Windows, right-click your C: drive in File Explorer and select Properties to see how much space is free. On Mac, click the Apple menu, select About This Mac, then click Storage.
If your drive is more than 90 percent full, delete old files, empty your Recycle Bin or Trash, and uninstall programs you no longer use. A full drive forces your computer to work much harder and causes freezing and slowdowns.
To check your memory usage, open Task Manager on Windows and look at the Memory column while you work. On Mac, open Activity Monitor (in Applications > Utilities) and look at the Memory tab. If memory usage is consistently above 80 percent even when you are not running many programs, your computer may not have enough RAM. At that point, consider closing some programs or upgrading your RAM — a task that usually requires a professional.
When to restart your computer versus calling for help
A single freeze that goes away after a restart is normal and not a sign of a serious problem. Restart your computer, update your programs, and move on. However, if your computer freezes multiple times per day, or if it freezes even when you are not running any programs, something deeper is wrong.
Repeated freezing can be caused by malware, a failing hard drive, overheating, or a driver that is not working correctly. These problems require professional diagnosis. Take your computer to a repair shop or contact the manufacturer's support line if freezing becomes a regular occurrence. Describe what program was running (if any) when it froze, how often it happens, and whether the freeze happens at a particular time of day or during a specific task — that information helps a technician pinpoint the cause.
Frequently Asked Questions
Is it safe to force-quit a program I was working in?
Yes, force-quitting closes only that program. Any unsaved work in it is lost, but your other open files and programs are unaffected. Save your work in other programs before force-quitting if you can still access them.
Will forcing a shutdown damage my computer?
Forcing a shutdown once in a while is safe. Your computer runs a check when it restarts to make sure no files were corrupted. Forcing a shutdown repeatedly or regularly can eventually damage your hard drive, so use it only when the computer is completely unresponsive.
Why does my computer freeze when I open a specific program?
That program may be outdated, incompatible with your operating system, or using more memory than your computer has available. Update the program first, then reinstall it if updating does not help. Check the program's website to see if your computer meets its system requirements.
Can a virus cause my computer to freeze?
Yes, malware can consume memory and processing power, causing freezes and slowdowns. If your computer freezes frequently even when running few programs, run a full scan with your antivirus software or take it to a repair shop for diagnosis.
What should I do if my computer freezes during startup?
Let it sit for a few minutes — startup can take longer than expected, especially after an update. If it is still frozen after five minutes, force a shutdown and restart normally. If it freezes during startup repeatedly, contact a technician, because this may indicate a hard drive problem.