What to do when your PC freezes and won't respond

A frozen PC usually means the operating system or a running program has stopped responding to your keyboard and mouse. The screen may be locked on one image, or you may see a spinning wheel or loading indicator that does not move. The fastest way to regain control is to force-close the frozen program or restart the computer, depending on whether just one program is stuck or the entire system has stopped.

Before you force anything, wait 10 to 15 seconds — sometimes a program is genuinely busy and will recover on its own. If nothing changes after that time, move to the steps below.

Key Takeaways

  • If only one program is frozen, use Task Manager (Ctrl + Shift + Esc on Windows, or Force Quit on Mac) to close it without restarting.
  • If the entire PC is frozen and you cannot open Task Manager, hold the power button for 10 seconds to force a shutdown, then restart normally.
  • After a forced shutdown, Windows will run a disk check on restart — let it finish, even if it takes several minutes.
  • Freezes that happen repeatedly often point to a specific program, driver, or low disk space, and identifying the pattern helps you fix the root cause.

Force-close a single frozen program on Windows

If your web browser, document editor, or another single program has frozen but your desktop and other programs still respond, use Task Manager to shut it down. Press Ctrl + Shift + Esc to open Task Manager directly. If that does not work, try Ctrl + Alt + Delete, then click Task Manager from the menu that appears.

In Task Manager, look for the program name in the list. It may show "Not Responding" next to the name. Click it once to select it, then click the End Task button at the bottom right. The program will close when ready. You can then reopen it normally.

If Task Manager itself will not open, your entire system is frozen — skip to the forced shutdown section below.

Force-close a frozen program on Mac

On a Mac, press Command + Option + Esc to open the Force Quit window. Find the program that is not responding — it will usually show "not responding" in red text. Click it once to select it, then click the Force Quit button. The program will close and you can reopen it.

If the Force Quit window will not open, or if the entire Mac is unresponsive, hold down the power button until the screen goes black, wait a few seconds, then press the power button again to restart.

Force a shutdown when the entire PC is frozen

If your keyboard and mouse do not respond at all, and you cannot open Task Manager or Force Quit, the entire system is locked. Hold down the power button on your computer for 10 seconds. The screen will go black and the computer will shut down completely. This is a hard shutdown — it is not graceful, but it is safe to do when nothing else works.

Wait 30 seconds, then press the power button once to restart normally. On Windows, you may see a message during startup saying the system did not shut down properly and asking if you want to run a disk check. Click Yes or let it run automatically. This check can take 5 to 15 minutes but helps prevent data loss.

Do not interrupt this check by pressing keys or moving the mouse. Let it finish completely before you use the computer again.

Restart your PC safely if it is still responsive

If your computer is slow or sluggish but you can still move the mouse or click, a restart often clears the freeze without forcing a shutdown. Click the Start menu (Windows) or Apple menu (Mac), then select Restart. Save any open work first if you can.

A normal restart is gentler on your system than a forced shutdown because Windows or macOS closes programs properly and saves temporary files. If you have time and the computer is still somewhat responsive, a normal restart is the better choice.

Why freezes happen and how to prevent them

Freezes usually come from one of a few sources: a program using too much memory or CPU power, a driver that is outdated or corrupted, a hard drive that is almost full, or malware running in the background. If your PC freezes only when you open one specific program, that program is likely the culprit. If it freezes randomly or during normal use, the cause is usually a driver, disk space, or background process.

To reduce freezes, keep your Windows or macOS installation updated — updates often include driver fixes. Check your disk space by opening File Explorer (Windows) or Finder (Mac) and looking at how much free space remains. If you have less than 10 percent of your drive free, delete old files or programs you no longer use. If freezes continue after a restart and a disk check, a technician can run diagnostic tools to identify the exact cause.

When to call a professional

If your PC freezes every time you start it, or if it freezes even after a fresh restart and disk check, the problem may be a failing hard drive, a hardware conflict, or malware that a standard restart cannot clear. A technician can run deeper diagnostics and, if needed, replace hardware or perform a clean reinstall of Windows or macOS.

If you are not comfortable doing a forced shutdown, or if you have important unsaved work and cannot afford to lose it, contact a local computer repair service. They can also help identify whether the freezes are tied to a specific program so you know whether to uninstall it or update it.

Frequently Asked Questions

Will a forced shutdown damage my computer?

A forced shutdown is safe to do and will not damage your hardware. It is not ideal because programs do not close gracefully, but it is far better than leaving your computer frozen. Windows and macOS are designed to handle unexpected shutdowns. The disk check that runs afterward helps protect your files.

What if my computer freezes during startup?

If it freezes while loading Windows or macOS, before you reach the desktop, restart again by holding the power button. If it freezes every time during startup, the problem may be a driver or a corrupted system file. Try restarting in Safe Mode (Windows) or Recovery Mode (Mac) to see if the freeze still happens. If it does not, a recently installed program or driver is likely the cause.

Can I prevent freezes by closing programs I am not using?

Yes. Closing unused programs frees up memory and CPU power, which reduces the chance of a freeze. Check Task Manager (Windows) or Activity Monitor (Mac) to see which programs are using the most resources. If one program consistently uses a lot of memory even when you are not actively using it, consider uninstalling it or finding an alternative.

Is a frozen PC a sign of a virus?

Freezes can be caused by malware, but they are usually caused by something else — a full hard drive, an outdated driver, or a program that uses too much memory. If you suspect malware, run a full scan with Windows Defender (built into Windows) or a third-party antivirus tool. If the scan finds nothing and freezes continue, the cause is probably hardware or a driver.