What to do when your computer stops responding

A frozen computer — one that won't respond to mouse clicks or keyboard input — usually means a single program has crashed or your system is overloaded with tasks. The fix depends on whether the whole screen is locked or just one window. In most cases, you can force the unresponsive program to close without restarting your machine, which takes less than a minute and saves any work in other programs.

The key is knowing which tool to reach for: Windows users have Task Manager, Mac users have Force Quit, and both let you shut down a frozen program directly. If the entire system is frozen and nothing responds at all, a hard restart is your only option — but that should be your last resort because it can corrupt files.

Key Takeaways

  • On Windows, press Ctrl + Shift + Esc to open Task Manager, click the frozen program, and select End Task to close it without restarting.
  • On Mac, press Command + Option + Esc to open Force Quit, select the frozen program, and click Force Quit.
  • If your entire screen is frozen and nothing responds, hold the power button for 10 seconds to force a shutdown, then turn the computer back on.
  • After unfreezing, restart the frozen program or check your system for resource problems if freezing happens repeatedly.

Force-quitting a frozen program on Windows

Press Ctrl + Shift + Esc at the same time. This opens Task Manager directly without going through the Start menu. If that combination doesn't work, try Ctrl + Alt + Delete, then click Task Manager from the menu that appears.

Look for the program name in the list — it may show "Not Responding" next to it. Click on it once to select it, then click the End Task button in the lower right corner. The program will close when ready. You can now reopen it or continue working in other programs.

If Task Manager itself won't open, your system is more deeply frozen. Move to the hard restart section below.

Force-quitting a frozen program on Mac

Press Command + Option + Esc at the same time. The Force Quit Applications window will appear, showing all open programs. Look for the one that says "Not Responding" or the one you know is frozen.

Click on the program name to select it, then click the Force Quit button. The program closes when ready. You can reopen it or continue with other work.

If the Force Quit window won't open, your system is frozen at a deeper level and you'll need to do a hard restart.

Performing a hard restart when nothing responds

If your mouse and keyboard are completely unresponsive and you can't open Task Manager or Force Quit, a hard restart is necessary. Hold down your computer's power button for 10 seconds until the screen goes black and the machine shuts down completely. Don't just press it once — hold it down.

Wait 30 seconds, then press the power button normally to turn the computer back on. This forces a shutdown without the usual save-and-close process, so you may lose unsaved work in open programs. That's why it should only be used when nothing else works.

After the restart, your computer should boot normally. If it doesn't, or if it freezes again when ready, there may be a hardware or software problem that needs diagnosis.

Why computers freeze and how to prevent it

A single program freezes when it encounters an error, runs out of memory, or gets stuck waiting for a response from another part of your system. Restarting that program usually fixes it. Your entire system freezes when you're running too many programs at once, your hard drive is nearly full, or malware is consuming resources.

To reduce freezing: close programs you're not using, restart your computer once a week, keep your hard drive at least 10% empty, and run antivirus scans monthly. If one specific program freezes repeatedly, uninstall and reinstall it, or check the software maker's website for updates.

If freezing happens constantly even after restarting, your computer may have a hardware issue like a failing hard drive or overheating. In that case, take it to a repair technician for diagnosis.

When to restart versus when to force-quit

Force-quitting closes only the frozen program and keeps everything else running — use this first. A full restart shuts down your entire system and closes all programs, which takes longer but fixes deeper problems. A hard restart (holding the power button) is a last resort because it bypasses the normal shutdown process and can damage files.

The order should be: try force-quitting first, then a normal restart if that doesn't work, then a hard restart only if the system won't respond at all. Most freezes are solved by force-quitting, so you rarely need to go further.

Frequently Asked Questions

Will force-quitting a program delete my files?

No. Force-quitting closes only that one program. Any unsaved work in that program will be lost, but files in other open programs are unaffected. When you reopen the frozen program, it will start fresh.

What's the difference between a hard restart and a normal restart?

A normal restart lets your operating system close programs and save data before shutting down. A hard restart (holding the power button) forces an when ready shutdown, bypassing that process. Hard restarts can corrupt files, so use them only when the system won't respond to anything else.

Why does my computer freeze every time I open a certain program?

That program may have a bug, be outdated, or conflict with another program on your system. Try updating it first — check the software maker's website for a newer version. If it still freezes, uninstall and reinstall it. If the problem persists, the program may not be compatible with your system.

Can I prevent freezes by closing programs I'm not using?

Yes. Each open program uses memory and processing power. Closing programs you don't need frees up resources and reduces the chance of freezing. If you regularly work with many programs at once, consider adding more RAM to your computer.