If you run into this Fn key not working problem, don’t worry. Many users have reported the same. Luckily, it’s not hard to fix at all…

Try these fixes 

All the fixes below work in Windows 10, 8 and 7. Just work your way down the list until the Fn key not working issue is resolved.

  1. Update your device drivers
  2. Uninstall your Synaptics driver
  3. Run Hardware and Device Troubleshooter

Fix 1: Update your device drivers

Perhaps the most common cause of the Fn key not working problem is an outdated/corrupted device driver.

Fortunately, this is also one of the easiest problems to fix.

There are two ways to update your video driver: manually and automatically.

Manual driver update – You can update the outdated/corrupted drivers manually by going to the manufacturers’ websites and searching for the most recent correct drivers. Be sure to choose only drivers that are compatible with your Windows version.


Automatic driver update – If you don’t have the time, patience or computer skills to update your video and monitor drivers manually, you can, instead, do it automatically with Driver Easy. Driver Easy will automatically recognize your system and find the correct drivers, and your Windows version, and it will download and install them correctly:

  1. Download and install Driver Easy.
  2. Run Driver Easy and click the Scan Now button. Driver Easy will then scan your computer and detect any problem drivers.

  3. Click Update All to automatically download and install the correct version of all the drivers that are missing or out of date on your system (this requires the Pro version – you’ll be prompted to upgrade when you click Update All).

    You can also click Update to do it for free if you like, but it’s partly manual.

  4. Restart your computer, check Fn key and see if it works properly.

Fix 2: Uninstall your Synaptics driver

It’s also possible that your current Synaptics driver is in conflict with Windows 10 and triggers the Fn key not working issue. We can try uninstalling the driver and see if it fixes the problem.

Here’s how:

  1. On your keyboard, press the Windows logo key  and R at the same time, then type devmgmt.msc into the box and press Enter.

  2. Double-click on Mice and other pointing devices > your Synaptics device.

  3. Click Yes to confirm the uninstall.
  4. Restart your computer and check if the Fn keys work fine this time. If the problem persists, don’t worry. There’s one more fix to try.

Fix 3: Run Hardware and Device Troubleshooter

If the fixes didn’t solve the situation, then you can run Hardware and Device Troubleshooter, a helpful built-in Windows tool and see if it can fix the Fn keys not working problem.

To do so:

  1. On your keyboard, press the Windows logo key and type troubleshoot, then click Troubleshoot.

  2. Locate and click on Hardware and Devices and click Run the troubleshooter.

  3. Click Next and follow the on-screen instructions to fix the issues it detects.
  4. Restart your computer and test the Fn keys on your computer to see if they’re working properly.

How have the fixes above helped you with your troubleshooting? Do you have any experiences or ideas to share with us? Feel free to drop a comment below and let us know your thoughts. 

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