I have a Yoga 2 Pro and I am wondering if there is any way to activate the Fn lock key as sometimes I need the F1, F2 and F3 keys but I have to press the Fn button to be able to press these. It is not convenient for me.
There is a BIOS setting to invert the function keys.
To enter Boot Menu or BIOS on your Win 8/8.1 system, refer to this article.
For systems running Win 7 or prior, press F1 to enter Boot Menu (for ThinkPads), and F2 for IdeaPads.
With reference to the sample image taken off a Yoga 13's BIOS, check your Yoga 2 Pro's BIOS for an equivalent setting to the one highlighted.
Press F10 to save the changes and exit BIOS.
Load into Windows and you shall be able to use F1-F12 keys directly without pressing Fn key.