Why Your Keyboard Stopped Responding

A keyboard that won't type usually falls into one of two categories: it's physically locked (intentionally disabled), or it's stuck because of a software glitch, driver problem, or accidental key press. The fix depends on which one you have, and most of the time you can solve it yourself in under five minutes.

Physical locks are rare on modern computers but still happen—usually when someone presses Ctrl+Alt+Num Lock, or when a keyboard driver crashes and stops responding to input. Software locks are more common and range from a stuck Caps Lock key to a frozen keyboard driver that needs restarting.

Key Takeaways

  • Check whether Num Lock, Caps Lock, or Scroll Lock is on—these keys can make it seem like your keyboard is broken when they're just preventing normal typing.
  • Try unplugging a USB keyboard and plugging it back in, or restarting your computer, before assuming the hardware is damaged.
  • If your keyboard is intentionally locked (Ctrl+Alt+Num Lock on Windows), the same key combination unlocks it.
  • A frozen keyboard driver can be restarted by opening Device Manager and toggling the keyboard device off and on.
  • If nothing works, a wireless keyboard may have a low battery or a disconnected receiver, which are the easiest fixes to check first.

Check the Lock Keys First

Before you assume your keyboard is broken, look at the indicator lights on the top right of your keyboard. If Num Lock, Caps Lock, or Scroll Lock is lit up, press that key to turn it off. Num Lock in particular can make your keyboard behave strangely—the number pad stops working as numbers and starts acting as arrow keys and navigation buttons instead.

Caps Lock being on won't stop you from typing, but it will make every letter uppercase. If you see that light on and you didn't turn it on, press Caps Lock once to turn it off. These are the most common reasons a keyboard seems to stop working normally.

Restart Your Computer

If the lock keys are off and your keyboard still isn't responding, restart your computer. A frozen keyboard driver or a temporary software conflict often clears itself when you reboot. Use your mouse to click the Start menu (Windows) or Apple menu (Mac), then select Restart.

If you can't use your mouse either, hold down the power button on your computer for 10 seconds until it shuts down completely. Wait 30 seconds, then press the power button again to turn it back on. This is a hard restart and should be your last resort, but it works when the keyboard is completely unresponsive.

Unplug and Reconnect a USB Keyboard

If you're using a wired USB keyboard, unplug it from the back of your computer or the USB hub. Wait 10 seconds, then plug it back in. This resets the connection and often brings a stuck keyboard back to life. Windows will recognize it as a new device and reinstall the driver automatically.

While the keyboard is unplugged, check the USB port itself for bent pins or debris. If the port looks damaged, try a different USB port on your computer. If the keyboard works in the new port, the original port may be faulty and you may need to use a different one going forward.

Unlock an Intentionally Locked Keyboard

On Windows, you can lock your keyboard by pressing Ctrl+Alt+Num Lock. If someone did this (or you did it by accident), the same key combination unlocks it. Press Ctrl, Alt, and Num Lock all at the same time. The keyboard should respond when ready.

This feature is less common on Mac computers, but some third-party software can lock the keyboard the same way. If you're on a Mac and this doesn't work, try restarting your computer or checking the System Preferences for any keyboard-locking software you may have installed.

Restart the Keyboard Driver in Device Manager

If your keyboard is plugged in but completely unresponsive, the driver (the software that tells Windows how to use the keyboard) may have frozen. You can restart it without restarting your whole computer. On Windows, right-click the Start button and select Device Manager.

Look for "Keyboards" in the list and click the arrow next to it to expand it. You should see your keyboard listed—it might say "Standard PS/2 Keyboard" or show the brand name. Right-click it and select "Disable device." Wait 5 seconds, then right-click it again and select "Enable device." Windows will reload the driver and your keyboard should work again.

If you don't see a Keyboards section, look under "Human Interface Devices" instead. The keyboard driver may be listed there as a generic input device.

Check a Wireless Keyboard's Battery and Connection

Wireless keyboards stop responding when the battery is low or the receiver (the small USB dongle) has lost its connection to the keyboard. First, replace the batteries with fresh ones—even if the keyboard seemed to work fine yesterday, batteries can die suddenly. Most wireless keyboards use AA or AAA batteries.

Next, check that the receiver is plugged into a USB port on your computer. If it's plugged into a USB hub that's turned off, or into a port that's not powered, the keyboard won't connect. Try unplugging the receiver and plugging it into a different USB port directly on the computer itself, not on a hub.

If your keyboard has a pairing button (usually on the bottom), press and hold it for 3 to 5 seconds while the receiver is plugged in. This re-establishes the wireless connection. Check your keyboard's manual for the exact location and duration—it varies by brand.

When to Call for Help

If you've tried all of these steps and your keyboard still won't respond, the hardware itself may be damaged. Liquid damage, a broken USB connector, or a failed internal circuit are not things you can fix at home. At that point, you'll need to replace the keyboard or take your computer to a repair shop if the keyboard is built into a laptop.

Before you buy a new keyboard, borrow one from a friend and plug it in to confirm the problem is the keyboard itself and not your computer's USB ports or driver software. If the borrowed keyboard works, you know the issue is your original keyboard. If the borrowed keyboard doesn't work either, the problem is your computer, and you should contact the manufacturer or a local repair technician.

Frequently Asked Questions

Can I unlock my keyboard without restarting?

Yes. Try pressing Ctrl+Alt+Num Lock to unlock an intentionally locked keyboard, or unplug and replug a USB keyboard. If those don't work, open Device Manager, find your keyboard in the list, disable it, wait 5 seconds, and enable it again. This restarts the driver without restarting your computer.

What if only some keys on my keyboard work?

This usually means physical damage or liquid spilled on the keyboard. Try unplugging it, letting it dry for 24 hours if it's wet, and plugging it back in. If only certain keys still don't work after drying, the keyboard likely needs to be replaced. Borrow a keyboard to test whether your computer itself is working normally.

Why does my keyboard lock when I press Ctrl+Alt+Num Lock?

This is a Windows accessibility feature designed to prevent accidental key presses. It's straightforward to trigger by accident. Press the same three keys again to unlock it. If you keep locking it by mistake, you can disable this feature in Windows Settings under Ease of Access, but most people just remember the unlock combination.

Is my keyboard broken if it stops working after I spill water on it?

Not necessarily. Unplug it when ready and let it dry completely for at least 24 hours in a warm, dry place. Don't try to use it while it's wet. After it's fully dry, plug it back in and test it. Many keyboards survive water damage if you dry them quickly enough. If it still doesn't work after drying, the internal circuits were damaged and it will need to be replaced.

Can I fix a keyboard that types the wrong characters?

This usually means your keyboard layout setting is wrong, not that the keyboard is broken. On Windows, go to Settings, select Time & Language, then Language. Make sure your keyboard layout matches your keyboard type (for example, QWERTY for a standard US keyboard). On Mac, go to System Preferences, select Keyboard, then Input Sources and check that the correct layout is selected.