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Laptop Keyboard Not Working? An External Keyboard Keeps You Typing

Most dead laptop keys are a software glitch, a stuck setting or crumbs. Try the free fixes first, then plug in a USB keyboard so work does not stop.

By Jamilur Rahman Updated November 5, 2026 · 7 min read

Time
20 min
Cost
$20-$50
Difficulty
Easy
A laptop keyboard seen from above with crumbs and dust between the keys on a wooden desk
In this guide
  1. Quick answer
  2. Free vs. permanent fix
  3. What you'll need
  4. Why it happens
  5. Try this first (free)
  6. When free fixes aren't enough
  7. Buy the fix
  8. Keyboard not working on an HP or Dell laptop? Same steps, plus the maker's tool
  9. What to skip
  10. FAQ
  11. Related problems

Quick answer

A keyboard not working on a laptop is usually a software glitch, a stuck setting or crumbs under the keys, not a dead keyboard. Restart, check Num Lock and the accessibility settings, then clear the debris. If the built-in keys still fail, a plain external USB keyboard gets you typing in a minute, and it also tells you whether the fault is software or hardware.

Free fix vs. permanent fix

Free fix · 20 minutes

Restart, check settings, clean the keys

  • Restart the laptop instead of using sleep
  • Turn off Num Lock, Fn Lock, Sticky Keys and Filter Keys
  • Reinstall the keyboard driver
  • Blow out dust and crumbs with short bursts of air

How long it lasts: Often permanent when the cause was a glitch, a setting or crumbs. It does nothing for a worn or damaged keyboard.

Most readers choose Permanent fix
Wired USB keyboard (illustration)
Illustration

A wired external USB keyboard

An external keyboard does not repair the built-in one, and we will not pretend it does. What it does is put you back to full speed today and show you whether the built-in keys have a hardware fault. If they do, you can wait for a repair, or skip it.

What to get: Wired USB keyboard

How long it lasts: As long as you need it. It works the moment you plug it in and it does not depend on the laptop's own keys.

Check price on Amazon

As an Amazon Associate I earn from qualifying purchases.

What you'll need

  • Soft brush or clean paintbrush

    Sweeps loose crumbs from between the keys

    You have it
  • Compressed air can (illustration)
    Illustration

    Compressed air can

    Short bursts only, held upright

    Check price
  • Our pick
    Wired USB keyboard (illustration)
    Illustration

    Wired USB keyboard

    Plug-and-play, and it works at the startup screens too

    Check price
  • Compact Bluetooth keyboard (illustration)
    Illustration

    Compact Bluetooth keyboard

    A tidier desk if you do not mind pairing it

    Check price

Why it happens

1

A software or driver glitch

A frozen keyboard driver, or an update that did not finish, can switch the keys off. Keys that die after sleep or an update are often this. A full restart clears most cases.

2

A setting that changes how keys behave

Sticky Keys and Filter Keys ignore short or repeated presses. Num Lock can make letters on the right side type numbers, and an Fn Lock can make the top row act strange. Many people think the keyboard is dead when a setting is the cause.

3

Crumbs, dust or a spill under the keys

Debris holds a key half down so it stops registering. A dried sugary drink makes several keys fail together.

4

A hardware fault

A loose or damaged ribbon cable, a worn keyboard panel or a swollen battery pressing on it will fail every test. That needs a repair or a replacement keyboard.

Try this first (free)

Do these in order, starting with the simplest.

  1. Restart the laptop fully

    Choose Restart, not Shut down or sleep. On Windows, a restart reloads drivers that Fast Startup can carry over from the last session. Test the keys before you open anything.

  2. Check Num Lock, Fn Lock and accessibility settings

    Press Num Lock once and try again. Look for an Fn Lock key, often on Esc. In Windows Settings, open Accessibility, then Keyboard, and turn off Sticky Keys and Filter Keys. On a Mac, check Accessibility, then Keyboard, for Slow Keys and Sticky Keys.

  3. Reinstall the keyboard driver

    On Windows, open Device Manager and expand Keyboards. Right-click the laptop keyboard, often listed as Standard PS/2 Keyboard, and choose Uninstall device. Restart and Windows reinstalls it on its own.

  4. Clear dust and crumbs

    Tool used: Compressed air can

    Power the laptop off and unplug it. Tilt it at about 75 degrees and give the keys short bursts of air from a few inches away, holding the can upright. Sweep along the gaps with a soft brush. Do not pry off the keycaps unless you know your model, since the clips snap easily.

    Compressed air can (illustration)
    Illustration

    Tool for this step

    Compressed air can · Short bursts only, held upright

    Check price on Amazon

  5. Plug in an external keyboard to find the fault

    Tool used: Wired USB keyboard

    Connect a USB keyboard. If it types fine, your operating system is healthy and the built-in keys are the problem. Then restart and run the startup diagnostics. If the built-in keys also fail there, it is hardware, not Windows.

    Wired USB keyboard (illustration)
    Illustration

    Tool for this step

    Wired USB keyboard · Plug-and-play, and it works at the startup screens too

    Check price on Amazon

When free fixes aren't enough

If the built-in keyboard fails in the startup diagnostics too, or whole rows of keys are dead after a spill, the fault is physical. A replacement laptop keyboard is often a repair-shop job, and some models are glued in. If the laptop base is bulging or the trackpad is rising, stop using it and have the battery checked by a professional. Until the repair happens, an external USB keyboard keeps you working with no drivers and no pairing. If the free fixes brought your keys back, you do not need to buy anything.

Buy the fix

Still stuck after the free fixes? These are the products we would look at.

Our picks compared
PickProductFixesWho it's forBuy
Best pick
Wired USB keyboard (illustration)
Illustration
Wired USB keyboard
not being able to type while the built-in keyboard is down Anyone whose built-in keys have failed and who needs to keep working today. Check price
Budget pick
Compressed air duster (illustration)
Illustration
Compressed air duster
keys held down by crumbs and dust Someone with a few sticky or silent keys and no sign of liquid damage. Check price
Upgrade pick
Compact Bluetooth keyboard (illustration)
Illustration
Compact Bluetooth keyboard
a cluttered desk and a long wait for a repair People who will use the external keyboard for months, or want to share it with a tablet. Check price
Best pick
Wired USB keyboard (illustration)
Illustration

Wired USB keyboard

Fixes: not being able to type while the built-in keyboard is down

Look for: A USB-A cable, or a USB-C adapter if your laptop has only USB-C ports; Full-size layout with a number pad if you type numbers all day; Quiet keys with normal travel, since you may use it for months.

Who it's for
Anyone whose built-in keys have failed and who needs to keep working today.
Honest downside
Your laptop has no free port. Look at the Bluetooth option instead.
Check price on Amazon
Budget pick
Compressed air duster (illustration)
Illustration

Compressed air duster

Fixes: keys held down by crumbs and dust

Look for: A thin straw nozzle for the gaps between keys; A can that is labeled safe for electronics.

Who it's for
Someone with a few sticky or silent keys and no sign of liquid damage.
Honest downside
Anything was spilled on the keyboard. Power off and get it checked, since air only pushes liquid deeper.
Check price on Amazon
Upgrade pick
Compact Bluetooth keyboard (illustration)
Illustration

Compact Bluetooth keyboard

Fixes: a cluttered desk and a long wait for a repair

Look for: Switch between two or three devices with one key; A rechargeable battery that lasts weeks; A layout you can type on without hunting for keys.

Who it's for
People who will use the external keyboard for months, or want to share it with a tablet.
Honest downside
The dead keyboard stops you from entering the BIOS or a password at startup. A wired keyboard is more reliable there.
Check price on Amazon

As an Amazon Associate I earn from qualifying purchases. We don't show prices because they change, so use the button to see today's price.

How we picked: How we picked: this page is based on laptop maker support guides, operating system help pages, and what owners report in keyboard reviews. We do not test products by hand.

Keyboard not working on an HP or Dell laptop? Same steps, plus the maker's tool

Everything above works on any brand. HP and Dell also include their own checkup tools. On many HP laptops you can press F2 at startup for the built-in hardware diagnostics, and on many Dell laptops you can press F12 at startup and choose Diagnostics. If your model lists a keyboard test, run it. The HP Support Assistant and Dell SupportAssist apps can also update drivers. If the laptop is still under warranty, ask about a free keyboard repair before you pay anyone.

What to skip

Pouring cleaner or alcohol under the keys

Liquid cleaners can seep into the circuit under the keys and cause the very fault you are trying to fix. Dry cleaning with air and a brush is safer. Also skip paying for a full laptop replacement before you test with an external keyboard, since the fault may turn out to be a setting.

Frequently asked questions

Why is my laptop keyboard not working but the mouse works?
The trackpad and the keyboard are separate parts. If the mouse works, the system is running, so look at settings first: Filter Keys, Sticky Keys or a driver glitch. Restart, then reinstall the keyboard driver. If an external keyboard types fine, the built-in one is the problem.
Why does my keyboard not work on my laptop after an update?
An update can leave a driver half installed. Restart once more, then uninstall the keyboard in Device Manager and restart so Windows installs it again. If that fails, check for a newer update, or roll back the last one.
How do I fix a laptop keyboard that has stopped working?
Work in this order: restart, turn off Num Lock, Fn Lock and the accessibility key settings, reinstall the keyboard driver and clean under the keys. Then plug in an external keyboard and run the startup diagnostics. If the built-in keys fail there too, it needs a repair.
How do I fix laptop keys not working, or laptop keyboard keys that stick?
If only a few keys fail, clean around them first, since crumbs are the usual cause. Check that the keycap is not loose or missing. If the keys still do not work, an external keyboard fills the gap while you arrange a repair.
Can I use an external keyboard all the time?
Yes. A laptop works fine with an external keyboard, and many people keep one plugged in at a desk. Just remember you will not have a built-in keyboard on the go.

As an Amazon Associate I earn from qualifying purchases. Affiliate disclosure

Wired USB keyboard (illustration)
Illustration

Our pick: Wired USB keyboard

Check price