Some Keyboard Keys Not Working? How to Fix Them

By Jayadeep · Updated June 2026

Quick answer: If some keyboard keys are not working while others are fine, the cause is usually debris under those keys, an accessibility setting like Filter or Sticky Keys, or a driver problem. Test the keys to see which fail, then clean, change the setting, or update the driver.

First, see exactly which keys fail: open the keyboard test and press each one. Keys that do not light up are the ones to focus on.

Is it the keyboard or the computer?

This one check saves the most time. Connect the keyboard to another device, or plug a different keyboard into this one. If the dead keys work elsewhere, the problem is software on your PC. If they fail on every device, the keyboard hardware is at fault and the rest of the software fixes will not help.

How to fix unresponsive keys

1. Clean under the keys

Dust, crumbs, and grit block the contact under a key. Power off, turn the keyboard upside down and tap it, then blow compressed air into the seams around the dead keys. If liquid was spilled, that can corrode the contacts and may need a repair.

2. Check Num Lock, F-Lock and accessibility settings

If only the number pad is dead, press Num Lock once. If the F1–F12 keys do the wrong thing, toggle F-Lock or hold Fn. Then open Settings → Accessibility → Keyboard and turn off Sticky keys, Filter keys, and Toggle keys, which can suppress or alter presses.

3. Update or reinstall the keyboard driver

Press Win + X → Device Manager, expand Keyboards, right-click your keyboard and choose Update driver. If that does nothing, choose Uninstall device and restart — Windows reinstalls it on boot.

4. Rule out background apps

Restart in Safe Mode and test the keys. If they work there, a third-party program or a key-remapping tool is the cause. Check any keyboard customization apps for remapped or disabled keys, and run a malware scan to rule out a keylogger.

Why did some keys suddenly stop working?

A sudden failure after a drop or spill points to hardware. A sudden failure after a Windows update or installing new software points to a driver or a remapping tool. And if the number pad alone "stopped working", it is almost always Num Lock being toggled off by accident. If you are also seeing repeated characters, see our guide on a keyboard typing double letters .

Confirm the fix

After the fix, run the keyboard test again and press every key once. Each press should register cleanly with no dead keys left.

Why Individual Keys Stop Working

When some keys work and others don't, the cause is usually physical debris or a software setting rather than a dead keyboard. The most common physical cause is dust, crumbs or hair under the keycap blocking the switch — a quick clean fixes a surprising number of dead keys. The most common software cause catches people out: Filter Keys, a Windows accessibility feature that ignores brief or repeated keystrokes, can make keys seem unresponsive. Turn it off at Settings → Accessibility → Keyboard → Filter keys on Windows 11 24H2. A spill is the other big one — even water can leave residue that bridges or blocks contacts as it dries.

Step-by-Step Fixes

1. Test which keys fail using the keyboard test so you know exactly what's affected before opening anything.
2. Power off and clean — turn the keyboard upside down, use compressed air, and gently lift a problem keycap to clear debris underneath.
3. Disable Filter Keys and Sticky Keys in Accessibility settings, which can both cause odd key behaviour.
4. Check the layout and Fn lock — if letters type numbers, NumLock or an Fn lock is on; if the top row behaves oddly, toggle the Fn/Function lock.
5. Reinstall the keyboard driver — in Device Manager, under Keyboards, uninstall the device and restart for a clean driver.
6. For a wireless keyboard, replace the batteries and reseat the USB receiver, ideally on a front port near the keyboard.

When It's the Hardware

If a key is still dead after cleaning and the software checks, the switch or the membrane beneath it has likely failed. On a mechanical keyboard, a hot-swappable board lets you drop in a new switch; otherwise it's a soldering job. On a membrane or laptop keyboard, a failed key usually means replacing the whole keyboard or, on a laptop, the keyboard assembly — though an external USB keyboard is a cheap, instant workaround. A whole block of dead keys (a row or a side) often points to a single damaged trace or connector rather than many failed switches.

Edge Cases

A few patterns have specific causes. If the numpad types nothing, NumLock is off. If keys work in some apps but not others, a game or app may be capturing them, or a macro/remapping tool is intercepting them — close utilities like AutoHotkey or vendor software to test. And if the keyboard works in the BIOS but not in Windows, the fault is software (driver or setting), whereas failing in the BIOS too points to hardware. Re-test with the keyboard test after each change.

Frequently Asked Questions