How do i disable the FN functions on my keyboard?

Hi

I got a new Keyboard a while back and I really like it an all but I am having just one nagging issue with it.

The F12 key has secondary function that turns off my computer and sometime I press it by mistake when I'm trying to press FN+another key as I can't quick save with F5 or F9 to quick load in a game as usual. I have to press FN+F5/F9 which is so annoying.

Is there a way to completely remove this feature so when I press the F1-F12 keys they function like normal keys. There must be a way to remove this functions.

My keyboard: Logitech Comfort Keyboard K290
http://www.amazon.co.uk/gp/product/B00EE7DVTM?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00

Thanks Community
 
Solution
I've never tried this, but perhaps a remap program and change to something less of an issue?
http://www.askvg.com/customize-any-key-in-your-keyboard-using-sharpkeys/