You need only install drivers for the hardware devices that are included with your specific laptop model. Take a look in Device Manager to see which drivers you are currently running. Download them from the ASUS website or go directly to the device manufacturer's website to obtain the latest version for your devices.
Copy them to a flash drive (at least the WiFi or Ethernet driver), so they are available to install to your new Windows installation.
G74SX-A1 - stock hardware - BIOS 202 - 2nd Monitor VISIO VF551XVT