Save all your personal or important files to the secondary drive or any other storage. (You have two disk drives, right?)
The faster way to download drivers and apps are found in JRd1st's thread:
http://rog.asus.com/forum/showthread.php?5224-Drivers-Apps-and-How-to-sDownload and save in your secondary drive or in a USB the following:
Intel Chipset INF Update Utility 9.3.0.1019
nVidia Driver (I recommend the 285.62 WHQL version)
Touch Pad (check unit if it's Sentelic or Synaptics)
Realtek HD Audio ALC269 Drivers R2.67 Official
WiFi (check unit if it's Atheros or Intel or others)
Realtek USB 2.0 Card Reader
Fresco Logic 3.0 USB
ATK Package 1.0.0014
ASUS G74SX-3DE