A laptop keyboard that stops responding — whether it is the whole keyboard, a few dead keys, or keys typing the wrong characters — can bring your work to a halt. Before assuming the worst, it is worth running through a few checks, because many keyboard problems are caused by software or settings rather than hardware. This guide covers both.
Why Is My Laptop Keyboard Not Working?
- Software or driver glitch — a corrupted keyboard driver is the most common cause.
- Wrong settings — Filter Keys, NumLock, or a changed input language causing odd behaviour.
- Frozen system — a hung process makes the keyboard appear dead.
- Dust or debris — crumbs and dust under keys, common with daily use.
- Liquid damage — a spill that shorted the keyboard membrane.
- Loose ribbon cable or hardware failure — needs opening the laptop.
Step-by-Step Fixes
1. Restart and rule out a freeze
- Save your work if possible and restart the laptop — a clean reboot fixes many temporary glitches.
- If the screen is frozen, hold the power button for 10 seconds to force a shutdown, then power back on.
2. Check the keyboard settings
- Open Settings > Accessibility > Keyboard and turn off Filter Keys (it can ignore quick keystrokes).
- Check NumLock if number keys type nothing or move the cursor.
- Confirm the input language is correct — press the language toggle if letters produce wrong symbols.
3. Reinstall the keyboard driver
- Right-click Start and open Device Manager.
- Expand Keyboards, right-click your keyboard, and choose Uninstall device.
- Restart — Windows reinstalls the driver automatically.
- If still faulty, return to Device Manager and choose Update driver.
4. Clean under the keys
- Shut down the laptop and turn it upside down.
- Gently tap the base to dislodge crumbs.
- Use compressed air at an angle to blow debris from between the keys.
- For a single sticky key, you can carefully prise off the keycap and clean beneath it.
5. Test with an external keyboard
Plug in a USB keyboard. If that works perfectly, the problem is your built-in keyboard hardware, not Windows. A USB or Bluetooth keyboard is also a perfect stop-gap while you arrange a repair.
Symptom to Fix Guide
| Symptom | Likely Cause | First Fix |
|---|---|---|
| No keys work at all | Driver / freeze / cable | Restart, reinstall driver |
| A few keys dead | Dust or debris | Clean under keys |
| Wrong characters typed | Language / NumLock | Check input settings |
| Keys repeat or lag | Filter Keys / driver | Disable Filter Keys |
Recommended Accessory
A wireless or USB keyboard is a cheap, reliable backup that lets you keep working while you fix or replace the built-in one.
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When to See a Technician
Get professional help if liquid was spilled (turn the laptop off immediately and do not charge it), if an external keyboard works but the built-in one is fully dead, or if the keyboard ribbon cable needs reseating. Keyboard replacement is inexpensive on most laptops and quick for a technician.
If the laptop also feels unresponsive in general, it may be a wider issue — see our laptop running slow fix. And if the screen has gone dark while the keyboard backlight is on, check laptop screen black but running.
Frequently Asked Questions
Why did my laptop keyboard suddenly stop working?
Most often a driver glitch or a system freeze. Restart first, then reinstall the keyboard driver from Device Manager.
How do I unlock my laptop keyboard?
Check that Filter Keys and NumLock are off, and try pressing the Fn key combination that toggles the keyboard lock on some models (often Fn with a lock-icon key).
Why is my keyboard typing the wrong letters?
The input language or keyboard layout has likely changed. Press the language toggle (often Windows + Spacebar) and verify the layout in settings.
Can I fix a single dead key myself?
Often yes — carefully clean under the keycap or reseat it. If the key still fails, the underlying switch may be faulty and the keyboard needs replacing.
What should I do after spilling liquid on the keyboard?
Shut down immediately, unplug the charger, turn the laptop upside down to drain, and take it to a technician. Do not switch it on or charge it until it has been checked.