How Do I Fix a Keyboard That Stopped Typing?

Quick Answer

Plug an external USB keyboard into the machine first. If the external one types, the laptop keyboard hardware has failed; if neither works, the problem is in Windows or macOS settings. Then check three suspects in order: Filter Keys (Windows accessibility setting), the keyboard driver in Device Manager, and trapped debris under the keys.

If those fail, a 60-second hardware power cycle (battery out where possible, hold power button for one minute) clears static charges that can lock a built-in keyboard.

The diagnostic isolation test

Every fix below depends on knowing whether the problem is software or hardware. Run this test first.

1. Plug a known-good USB keyboard into the machine.
2. Open Notepad (Windows) or TextEdit (Mac) and try typing.
3. If the external keyboard types: the OS is healthy and your built-in keys are dead. Skip to the cleaning and power cycle sections.
4. If neither keyboard types: the OS is the problem. Work through the software fixes below.
5. If both keyboards type but the built-in one has missing characters or lag, treat it as software too; finish the software ladder before assuming hardware failure.

Software fix 1: turn off Filter Keys (Windows)

Filter Keys is an accessibility feature that ignores brief or repeated keystrokes. It is the single most common reason a Windows keyboard "stops working" without warning, because pressing Right Shift for eight seconds enables it silently.

1. Open Settings, Accessibility, Keyboard.
2. Toggle Filter keys to Off.
3. While you are there, toggle Sticky keys and Toggle keys off as well unless you specifically use them.

Test the keyboard. If keys now register, the problem is solved.

Software fix 2: reinstall the driver

A corrupted keyboard driver locks input for the whole device. Reinstall is a 30-second operation.

1. Press Windows + X, choose Device Manager.
2. Expand the Keyboards branch.
3. Right-click your active keyboard (often "Standard PS/2 Keyboard" or a vendor-specific name), choose Uninstall device.
4. Confirm. The driver disappears.
5. Restart the PC. Windows reinstalls a fresh driver automatically on boot.

On Mac, drivers are not user-managed for the built-in keyboard. Skip to the SMC reset (covered below) instead.

Software fix 3: roll back a recent Windows update

If the keyboard died right after a Windows update, roll the update back.

1. Open Settings, Windows Update, Update history.
2. Scroll down and click Uninstall updates.
3. Pick the most recent quality update, click Uninstall.
4. Restart.

If the keyboard works again, pause updates for a few weeks while Microsoft patches the regression.

Software fix 4: check the input source (Mac)

On macOS, an exotic keyboard layout can make familiar keys output nothing. Open System Settings, Keyboard, click Edit next to Input Sources, and confirm only the layouts you actually use are listed. Switch with Control + Option + Spacebar.

While there, open Accessibility, Keyboard, and turn off Slow Keys if it is on. Slow Keys requires every press to be held for a minimum time before registering, which feels like a broken keyboard.

Hardware fix 1: clean the keys

Dust, hair, and crumbs sit under the keycap and block the membrane contact. This is by far the most common reason a single key dies on a laptop.

1. Power off the laptop and unplug it.
2. Turn it upside down and tap the back gently to dislodge loose debris.
3. Hold a can of compressed air upright and run a short burst at each key, especially the dead ones.
4. If safe for your model, lift the keycap with a flat plastic tool to inspect and clean underneath. Research the technique for your specific laptop first; some scissor switches snap and break.
5. Wipe sticky residue with a cotton swab dampened (not soaked) in isopropyl alcohol. Let the area dry fully before booting.

Hardware fix 2: power cycle

Static buildup inside a laptop can lock the keyboard controller until the board is fully drained.

1. Shut down the laptop.
2. Unplug the charger.
3. If the battery is removable, take it out.
4. Hold the power button for 60 seconds.
5. Reinsert the battery, plug in the charger, boot.

On Mac with Apple Silicon, a shutdown and 30 second power-off is enough; the old SMC reset no longer applies. On Intel Macs, the SMC reset is the equivalent: Shift + Control + Option + Power for 10 seconds with the charger plugged in.

Hardware fix 3: external keyboard as a long-term workaround

If a built-in laptop keyboard has truly failed, replacing it is a 50 to 150 dollar repair on most models. A 15 dollar external USB keyboard buys you weeks of normal use while you decide. Pair with a small USB hub if your laptop only has one or two ports, or pick a Bluetooth model if you want a clean desk.

Single-key versus whole-keyboard failure

• One key dead: almost always debris or a worn switch. Clean and, if needed, replace the switch (on mechanical hot-swap boards) or the membrane (on most laptops).
• A whole row dead: on a laptop, that usually means a torn ribbon cable inside the chassis after a hinge repair. Service required.
• Everything dead: software (Filter Keys, driver, power cycle) or a disconnected ribbon. Walk the software ladder first.

Wireless keyboard specifics

• Swap the batteries. Many Bluetooth keyboards stop typing entirely when the battery drops below 5 percent rather than warning you.
• Re-pair the keyboard. Remove it from Bluetooth settings and pair again.
• Move the receiver dongle. USB 3.0 ports radiate interference in the 2.4 GHz band and can drown out wireless keyboard signals; switch the dongle to a USB 2.0 port if you can.

FAQs

Why does my keyboard type wrong characters?

Layout mismatch. Press Windows + Spacebar to cycle layouts on Windows, or Control + Option + Spacebar on Mac.

Can a virus disable my keyboard?

Rare, but possible. Boot into Safe Mode (Windows) or Recovery Mode (Mac) and test. If the keyboard works there, scan for malware before booting back into normal mode.

Is it worth replacing a laptop keyboard?

Yes on a laptop newer than two years and cheaper than 1000 dollars to replace whole. On older machines, an external keyboard often costs less than the repair labour.

The takeaway

Test with an external keyboard first to isolate software from hardware. Walk the software ladder (Filter Keys, driver, recent update). If hardware is the culprit, clean, power cycle, and decide between repair and an external board. Most "dead" keyboards revive somewhere in the first three steps.