Windows 10: How can I lock only f5 key instead of locking all function keys?

My f5 key for increasing brightness is not working may be crashed of broken or something. so brightness is increasing automatically. I want to lock this F5 key without locking all function keys. how can I do this?

:)

 

Function Key Lock

I need help with the function key lock. My windows 7 doesn't have the fn lock pad on my keyboard so I need help using another way to enabling the Fn key lock?!

 

Microsoft Bluetooth keyboard function keys lock

Am having trouble getting the function keys lock on my Microsoft Bluetooth keyboard. Found a support posting suggesting that holding down the Fn key while pressing the CAPs lock key for 5 seconds would set the function keys lock, but it doesn't seem to be working for me. Have reset and reconnected my keyboard. Still doesn't seem to work.

Anyone with any other ideas?

* Moved from Mobile Devices

 

Rotation lock key is not functioning

Since the Rotation lock is still grayed out, our next step is to uninstall/Update your display driver. To uninstall your your drivers, you can do the following:

• Press the Windows and X key on your keyboard and click on
  Device Manager.
• On the Device Manager window, click on the Display adapter drop-down.
• Right-click the driver and choose uninstall.
• Restart your computer.

If it is the same, update the said driver by following these steps:

• Go Back to the Display adapter drop down in Device Manager.
• Locate your display adapter driver, right-click and choose
  Update Driver Software.

We would also suggest that you go to your device manufacturer's website and download the latest driver for your device.

For further queries, feel free to post back.