Go to.............
http://www.asus.com/ROG_ROG/G74SX/HelpDesk_Download/Download and reinstall the following:
- ATKACPI driver and hotkey-related utilities
- KB Filter Driver
Also, to turn on the Backlighting its fn+F4
GL702VSK / GTX 1070 / M.2 960 EVO
HTPC MINI-ITX / FRACTAL CORE 500 / GIGABYTE GA-AB350N / GTX 1050 Ti Windforce OC 4G / RYZEN 5 1600 3.9GHz / M.2 960 EVO / G.SKILL Ripjaws V Series 3200MHz
OLD
ASUS G74SX-XC1 / INTEL 7260 AC / Samsung 850 PRO / TUNIQ TX-4 / BIOS 203 / 335.23