Lock or Unlock Function (Fn) key in Windows 11/10

The Function key provides a set of commands for keys on a keyboard including standard function keys (F1 – F12). F-keys perform a dual role, both as multimedia and designated keys. In this article, we will show you four different methods to Lock or Unlock Function (Fn) key in Windows 11/10.

Pressing one of these keys without using Fn will let you use the standard commands that improve your productivity: volume or brightness adjustment, mute audio, activate/deactivate Bluetooth or Wi-Fi, play media, and so on. Pressing these keys with Fn will let you access the alternate command of the key.

Lock or unlock Function (Fn) key in Windows 11/10

You can lock or unlock the Function key using four methods:

Method 1: Lock or unlock Function key using the Keyboard Shortcut

Keyboard shortcut is the simplest method to lock the function key in Windows 11. In keyboard, there is the small lock sign under the ESC key and Fn printed key (See the image below).

To lock the function key, press the key and Fn key simultaneously. To unlock, repeat it again.

Method 2: Lock or unlock Function key using BIOS Settings

Locking the function key with this method can change dual-use keys into single-use and require system to have advanced BIOS options. Follow the below steps to lock the function key using BIOS/UEFI settings:

Note: These steps usually work but may also vary device to device.

1. Restart your PC. As soon as the computer restarts, press F2. You will enter the BIOS.

2. In the BIOS, go to the “Main” tab.

3. Now, select “Function key behavior” option.

4. Select “Function key“.

5. After making the changes, press F10 to save. In confirmation prompt box, click Yes.

6. The function key is locked.

To disable or Unlock the function key, select “Media key” (Step 4) option.

Method 3: Lock Fn key using UEFI settings

If you cannot boot into BIOS, try changing function key using UEFI settings.

1. Open Settings App and go to System.

2. Now, go to Recovery and choose restart now.

3. In prompt box, select Troubleshoot => Advanced options.

4. Click on UEFI Firmware settings and select Restart.

5. Under the Configuration tab, select hotkey Mode and select Disable or Enable.

6. Click Save and then press Exit to sign out of BIOS.

Method 4: Lock Fn key using Control Panel

1. Open Control Panel. Go to View by and select Small icons.

2. Now, click on the Windows Mobility Center option.

3. Now, click on Function key Row dropdown menu and select Function key.

4. The function key is locked.

That’s It!