Luckily, if your Fn keys are not working, there are ways to fix them. 

In this article, we’ll find out the reasons behind this issue and explore the possible solutions to resolve it. First, let’s answer the question, “Why are the function keys not working on my keyboard?” and then proceed to methods on how to fix the F keys not working on your computer.

Why Are My Function Keys Not Working

Let’s take a look at the most common causes that can force your function keys to stop responding. They may vary greatly, ranging from super simple ones to rather complex software and hardware problems. Here they are:

  1. Sometimes, the Fn Lock button may be activated, turning off your function keys.
  2. Dirt, grime, or debris trapped beneath the function keys can make them inoperable.
  3. A faulty keyboard or damaged function key circuitry can also cause function keys to stop working.
  4. Outdated drivers, software conflicts, or system glitches are also among the well-known reasons that can affect function key operation.

Also read: What to Do if the Mouse and Keyboard Are Not Working on a Laptop?

Simple and Fast Fixes to the Function Keys Not Working Issue

Before anything else…

The most common and yet most often overlooked fix is a simple restart. This can resolve minor software glitches that, for some reason, prevented your function keys from working properly.

It’s also essential to keep your keyboard clean, so gently wipe it and use condensed air to remove any dirt or grime that might be affecting the keys’ functionality.

Additionally, several users reported that they had been able to get their function keys working by pressing the F11 or F12 keys. There is no harm in trying the same solution. Give it a shot, then check if it has resolved the issue.

Now, if none of the basics above didn’t help, you’re ready for some real troubleshooting.

Method 1: Checking if the function keys are locked

In most cases, the reason for your F keys not working is that you have unknowingly pressed the F lock button. Don’t worry, because we’re here to teach you how to unlock the function keys on Windows 10 and 11. We recommend looking for an Fn Lock (F Lock) or Fn Mode (F Mode) key on your keyboard. If there is one, try pressing it, then check if the Fn keys are now working.

On some keyboards, to enable or disable the Fn Lock, you need to simultaneously press Caps Lock and the Fn key.
Fix this issue quickly
You can try using a safe and totally free tool developed by the Auslogics team of experts.
A few simple steps to troubleshoot the issue:
Download the tiny Auslogics TroubleShooter tool.
Run the application (no installation is needed).
The app will check for the issue mentioned in the article. When the scan is done, check that this is the issue you were looking to solve and click ‘Apply now’ to apply the recommended fix.
You can use the app to troubleshoot other malfunctions for free by simply typing in a brief description of the issue your PC is experiencing. Or you can scan your PC for performance issues using the My Scanner tab.
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Method 2: Updating your keyboard driver

The Fn keys may start to malfunction or stop working at all when the keyboard driver on your computer is damaged, corrupted, or outdated. Thankfully, this problem can easily be solved by updating your drivers. There are three ways to do this:

  • Via Device Manager.
  • Downloading the driver via the manufacturer’s website.
  • Using Auslogics Driver Updater.

Via Device Manager

  • On your keyboard, press Windows key + X.
  • From the list, select “Device Manager.”
  • Now, expand the contents of the “Keyboards” category.
  • Right-click your keyboard, then select “Update driver.”
  • Select “Search automatically for drivers.”
How do you want to search for drivers

Downloading the driver via the manufacturer’s website

You must know that even when you update your keyboard driver via Device Manager, your system can still miss the appropriate version. To avoid that, you need to go to the manufacturer’s website, then locate the right keyboard driver for your processor type and OS

Make sure you find the right version, because if you don’t, you will cause more problems for your computer.

Using Auslogics Driver Updater

When you manually update your keyboard driver, you may be putting your PC at risk. Moreover, the process can be time-consuming because you need to find the right version for your operating system and processor type. 

On the other hand, when you use Auslogics Driver Updater, you only need to click a button. The tool will automatically recognize your OS and processor type, then locate the right keyboard driver for your computer. The best part is that this software program will update all your drivers. So, you can resolve the problem and even improve the performance of your PC.

Auslogics Driver Updater 9 outdated drivers found
Update drivers automatically with Auslogics Driver Updater

Method 3: Run the Hardware and Devices troubleshooter

  • Click on the search icon and type “cmd.”
  • Right-click on the top result and select “Run as administrator.”
Run cmd as admin
  • Then, copy and paste this command and press Enter:
msdt.exe -id DeviceDiagnostic
cmd device diagnostic
  • The Hardware and Devices troubleshooter will open. Click “Next” and then click “Apply fix” if the troubleshooter suggests it to fix issues with your keyboard.
Troubleshoot and help prevent computer problems

Method 4: Run the Keyboard troubleshooter

  • Press the Windows key and select the gear icon to open the “Settings” app.
  • In the search area, type “keyboard troubleshooter” and select the “Find and fix keyboard problems” option.
  • Click “Next” and follow the prompts to identify and apply any recommended fixes.
Find and fix keyboard problems

Method 5: Turn off Filter Keys

  • Press Windows key + I to open the “Settings” app.
  • Click on “Accessibility” and select “Keyboard.”
  • Under the “Sticky, Filter, and Toggle keys” section (“Use Filter Keys” in Windows 10), toggle the switch to disable “Filter Keys” if it is enabled.
Accessibility keyboard

Method 6: Restart the “HidServ” service

  • Right-click Start and select “Task Manager.”
  • Click on the “Services” tab.
  • Scroll down and locate “HidServ” in the list.
  • Right-click on “HidServ” and select “Restart” from the context menu.
  • Close the Task Manager.
Task manager services
“Hidserv,” or Human Interface Device Service, is a service responsible for maintaining the proper functionality of devices, such as mice, keyboards, game controllers, etc.

Function Keys Not Working on Windows 10/11: Fixed

That’s it on how to deal with the Fn keys not working on your computer. From a simple restart to advanced troubleshooting solutions, you are now armed with the knowledge to resolve the issue once and for all.

Feel free to share which method worked for you by dropping a comment below! And if you found this article helpful, don’t hesitate to share it!


The most common reasons for function keys not working are outdated drivers, software conflicts, and issues with hardware.
To change the Fn key settings, you need to go to the BIOS or UEFI settings of your computer and look for the option related to function key behavior. The exact name of the option may vary, but usually it’s called something like “Hot Keys” or “Action Keys.”
Pressing the F3 key on a laptop typically lowers the brightness; however, when pressed with the Fn key, it allows you to open search dialogs within applications.
On most computers, you can disable the Fn key in the BIOS or UEFI settings. There are also third-party software programs that allow you to customize function key behavior and disable it.
The functions of F8 and F10 keys vary depending on the context and the program you’re using. In Windows, for instance, F8 is often used to access the boot menu during startup, and F10 may trigger specific commands in certain applications.