Keyboard Keys Not Working? 9 Easy Fixes for Laptop and PC

Updated October 29, 2026 · 6 minute read

A key never dies at a convenient moment. It's usually the E key, or Enter, or whatever you need to finish an email. The good news is that most keyboard problems turn out to be boring: a setting, a few crumbs, or a driver that got confused. Work through these in order. I've put the quick, free fixes first.

First, find out which keys are actually dead

Don't guess. Open the Keyboard Tester and press every key once. Anything that never lights up has a problem. The pattern is useful too. One or two dead keys usually mean something physical, like dirt or a worn switch. A whole row or block going quiet points more towards software, a loose cable inside, or a spill that reached the circuit board.

Restart. Yes, really

It sounds lazy, but a restart clears out stuck drivers and background programs that quietly swallow key presses. It takes a minute, so do it before anything else and test again.

Check for a lock or mode you switched on by accident

If your letter keys are typing numbers, Num Lock or an Fn lock is on. Many laptops toggle the function row with Fn and Esc. Look at your language settings too. A wrong layout makes keys print the wrong symbols and looks exactly like a broken keyboard. We have a separate guide on fixing the wrong keyboard layout.

Turn off Sticky Keys and Filter Keys

On Windows, open Settings, then Accessibility, then Keyboard. Switch off Sticky Keys, Filter Keys and Toggle Keys. Filter Keys is the sneaky one. It ignores quick or light presses, so a perfectly healthy keyboard starts to feel dead.

Clean it properly

Shut the machine down and unplug it. Tilt the keyboard and blow short bursts of compressed air between the keys. If a key feels sticky after a spill, wipe the cap with a cloth that is only slightly damp with isopropyl alcohol. Never pour or spray liquid straight onto a keyboard. The full routine is in our guide on cleaning a laptop keyboard safely.

Look under the keycap

On a desktop or mechanical keyboard you can lift a keycap with a flat tool and look underneath. Something small is sometimes jammed in there. Laptops are different. The tiny scissor clips snap easily, so don't pry unless you know your model.

Reinstall the keyboard driver

In Windows, open Device Manager, expand Keyboards, right-click yours and choose Uninstall device. Restart and Windows puts a fresh driver back. On a Mac there's not much to reinstall, so just install any pending updates.

Plug in another keyboard, then try the BIOS

Connect a USB keyboard. If it works fine, your built-in one has a hardware fault. For a second opinion, press the BIOS key during startup (often F2, Del or F10). If your keys work in the BIOS but not in Windows, the problem is software. If they fail there too, it's hardware.

Know when to stop fixing it

If a key still does nothing after cleaning and a driver reinstall, the switch or the ribbon cable under it has probably worn out. Replacement keyboards for popular laptops are often fairly cheap, and an external keyboard costs less still. If the laptop is under warranty, talk to the maker before opening anything.

One more thing if you're buying used

Test every key before you hand over any money. Our second-hand laptop checklist covers the rest of the machine as well.

Test your keyboard now