What to do when your computer stops responding
A frozen computer — one that stops responding to your mouse clicks and keyboard input — usually means a single program has crashed or your system is overloaded with tasks. The fix depends on whether the entire system is locked or just one window. Most of the time, you can force the unresponsive program to close without restarting your whole machine, which saves you the time of booting back up and losing any unsaved work in other programs.
The steps differ between Windows and Mac, but both operating systems give you a way to shut down a frozen program without shutting down everything else. If those steps do not work, a full restart is your last resort — and it usually works because it clears your computer's memory and stops all running processes at once.
Key Takeaways
- On Windows, press Ctrl + Alt + Delete, select the frozen program from the Task Manager list, and click End Task to close only that program.
- On Mac, press Command + Option + Escape, click the frozen program, and click Force Quit to close it without restarting.
- If your entire screen is frozen and you cannot open Task Manager or Force Quit, hold the power button for 10 seconds to force a shutdown, then turn the computer back on.
- After unfreezing, check for updates and restart your computer normally to clear temporary files and prevent the freeze from happening again soon.
- Freezes that happen repeatedly point to a specific program, outdated drivers, or insufficient disk space — each has a different fix.
Unfreezing a frozen program on Windows
Press Ctrl + Alt + Delete on your keyboard. This opens a menu with several options. Click Task Manager (or Open Task Manager if you see that wording). Task Manager shows every program currently running on your computer.
Look through the list for the program that is not responding. It will usually have the words "Not Responding" next to its name. Click on it once to select it, then click the End Task button in the lower right corner of the window. The program will close. If you have unsaved work in that program, it will be lost, but other programs you have open will stay running.
If Task Manager itself will not open when you press Ctrl + Alt + Delete, your entire system is frozen. Skip to the "Force shutdown your computer" section below.
Unfreezing a frozen program on Mac
Press Command + Option + Escape on your keyboard. This opens the Force Quit Applications window, which lists every program running on your Mac. Look for the program that is frozen — it will often show "(not responding)" next to its name.
Click the program name to select it, then click the Force Quit button. The program will close when ready. Any unsaved work in that program is lost, but your other open programs will continue running normally.
If the Force Quit window itself will not open, your entire system is frozen and you need to force a shutdown.
Force shutdown your computer when the entire screen is frozen
If you cannot open Task Manager on Windows or Force Quit on Mac, the entire system is locked. Hold down your computer's power button for about 10 seconds without releasing it. The screen will go black and the computer will shut down completely. This is not the same as a normal shutdown — it cuts power to everything when ready.
Wait 30 seconds, then press the power button once to turn the computer back on. It will boot normally. This process clears your computer's memory and stops all running processes, which almost always fixes a complete freeze. You will lose any unsaved work in all open programs, but the computer itself will not be damaged.
Restart your computer normally after unfreezing
After you have closed the frozen program or forced a shutdown, restart your computer through the normal shutdown menu rather than just leaving it running. On Windows, click the Start menu, then the power icon, and select Restart. On Mac, click the Apple menu and select Restart.
A normal restart clears temporary files and memory that may have contributed to the freeze. It also gives your system a chance to install any pending updates, which sometimes fix bugs that cause freezing. Let the restart complete fully before opening programs again.
Check for updates and free up disk space
If your computer froze, check whether updates are waiting. On Windows, open Settings, go to System > About, and look for an Update button. On Mac, open System Settings, click General, then Software Update. Install any updates you find and restart again.
Freezes also happen when your hard drive is nearly full. On Windows, open File Explorer, right-click your C: drive, and select Properties to see how much space is free. On Mac, click the Apple menu, select About This Mac, then Storage. If you have less than 10 percent of your drive free, delete large files you no longer need or move them to an external drive. A full hard drive forces your computer to work much harder and causes slowdowns and freezes.
Identify if one program keeps freezing
If the same program freezes repeatedly, the problem is with that program, not your whole computer. Check whether an update is available for it. Open the program, look for a menu option like Help > Check for Updates or About [Program Name], and install any update offered. Developers release updates specifically to fix freezing and crashing bugs.
If updates do not stop the freezing, the program may not be compatible with your current operating system version, or it may have a conflict with another program you have installed. Try uninstalling and reinstalling the program. On Windows, go to Settings > Apps > Apps & Features, find the program, click it, and select Uninstall. On Mac, open Applications in Finder, drag the program to the Trash, and empty the Trash. Then read and install a fresh copy from the program's official website.
When to restart versus when to call for help
A single freeze that goes away after you close the program or restart is usually not a sign of a serious problem. Computers freeze occasionally when a program uses too much memory or a background task interferes. Restart normally and move on.
Freezes that happen multiple times a day, even after updates and a clean restart, point to a deeper issue — a failing hard drive, a driver that needs updating, malware, or a hardware problem. At that point, consider taking your computer to a repair shop or calling the manufacturer's support line. They can run diagnostic tests to find the real cause. Do not ignore repeated freezes, because they often get worse and can eventually prevent your computer from starting at all.
Frequently Asked Questions
Will forcing a shutdown damage my computer?
No. A forced shutdown is safe for your hardware. It is the same as unplugging the power cable — abrupt, but not harmful. You will lose unsaved work in open programs, which is the real cost. Use it only when the computer will not respond to normal commands.
Why does my computer freeze when I have a lot of browser tabs open?
Each open browser tab uses memory. If you open too many, your computer runs out of available memory and slows to a crawl or freezes. Close tabs you are not using, or restart your browser periodically. If freezing happens even with just a few tabs, your computer may not have enough total memory for your typical workload — a technician can advise whether adding more RAM would help.
Can a virus cause my computer to freeze?
Yes. Malware can consume system resources or interfere with normal operations. If freezing started suddenly and you recently visited unfamiliar websites or opened suspicious email attachments, run a full scan with your antivirus software. On Windows, Windows Defender (built in) can scan for threats. On Mac, Malwarebytes is a common choice. If a scan finds nothing and freezing continues, a technician can investigate further.
Is it safe to use my computer right after unfreezing it?
Yes, once the freeze is resolved and you have restarted normally. However, if the same program froze, do not when ready open it again without updating it first. If your entire system froze, give it a few minutes to settle before opening multiple programs at once — let it finish any background processes from the restart.
What if Task Manager or Force Quit opens but is also frozen?
If the window opens but will not respond to clicks, force a shutdown by holding the power button. Task Manager and Force Quit are system tools, so if they freeze too, your entire system is locked and a forced shutdown is your only option.