keyboard - Enable F1-F12 keys without Fn on Lenovo Ideapad S400u

I just have bought a new Lenovo Ideapad S400u notebook, and it is not default F1-F12, it is default mute button, refresh, more brightness, less brightness...

I've downloaded "Lenovo Keyboard Slim Fn Switcher" or something like that, but it didn't work.

Then, how can I change Fn function to get my F1-F12 buttons? I'm running Windows 8.1.

Answer

I think the Lenovo IdeaPad S300/S400/S400u/S405 User Guide V2.0 (pdf) has what you want on page 12 in Chapter 2. Learning the basics where it says:

• Setting hotkey mode

  By default, the hotkey functions are accessible by pressing the appropriate hotkey. However, you can disable the hotkey mode in the BIOS setup utility.
  To disable the hotkey mode:

  
  
  1. Shut down the computer.
  
  
  2. Press the Novo button and then select BIOS Setup.
  
  
  3. In the BIOS setup utility, open the Configuration menu, and change the setting of HotKey Mode from Enabled to Disabled.
  
  
  4. Open the Exit menu, and select Exit Saving Changes.
  
  
  
  

_{Note: When hotkey mode is disabled, press the Fn key and the appropriate hotkey to access the corresponding hotkey function.}