Computers (PCs) do not have the so called Function (FN), therefore, if you are a PC owner you should not have a FN key on your keyboard So please bypass this post.
Fn keys have been designed to perform specific actions on laptops, for example, turn Wi-Fi off or on, change screen’s brightness, turn the sounds on or off, get the screen to sleep, and so on. The Fn key always goes in combination with the other keys, usually F(1-12). Unfortunately, quite frequently the Fn key stops working and this typically happens after upgrading Windows from earlier versions or installing the latest updates. According to the latest reports, people using ASUS, HP, Acer, and Lenovo laptops most frequently encounter issues related to Fn keys.
Here are some possible solutions to resolve your issue:
OPTION 1 – Update Device Drivers
Usually, Function keys stop working after upgrading the system to Windows after he earlier versions or installing the latest updates. The reason may be incompatible or outdated system drivers. Therefore, you should navigate to Device Manager and check if there are any malfunctioning drivers. For this purpose, do the following:
Right-click Windows key and select Device Manager
Expand each category one-by-one and check if any of the device drivers are marked with a yellow exclamation mark
If you detected some of the outdated drivers, right-click them and select Update Driver Software
After the update, reboot the system
OPTION 2 – Uninstall Synaptics Pointing Device Driver
Synaptics pointing Device driver has been found to be conflicting with the Windows 10 OS. Such a conflict may trigger Fn key error, so try to uninstall the driver. For this purpose, please follow these steps:
Right-click Windows key and select Device Manager
Expand the Mice and other pointing devices section and click Synaptics driver
Select Uninstall driver and click OK on the confirmation window
If the driver is not given in Device Manager, you can either look for it in Control Panel or search for it using Windows search
Anyway, after the removal, reboot the system
OPTION 3 – Uninstall Hotkey Drivers
Right-click Windows key and select Device Manager
Locate the Hotkey driver for your device and right-click it
Select Uninstall
Now locate the HID Compliant Keyboard and HID Compliant Mouse drivers, right-click them, and opt for Uninstall option
After all, reboot the system
OPTION 4 – Enable VAIO Event Service (Sony Laptops Only)
Press Windows key + R, type services.msc and press Enter
Locate the VAIO Event Service and double-click it
Click OK and Apply to save the changes
Check the section of the Startup type and make sure to set it to Automatic
Then Click Service Status and make sure that it’s started. Otherwise, start it
