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 The reason may be incompatible or outdated system drivers.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:
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: