Sounds to me that your way more involved it this than the rest of us. All these notebooks come UEFI GPT the OS is installed on C:\ partition To understand the UEFI, this is the website
http://www.uefi.org/ Most if not all computers are being built on this standard rather than BIOS MBR. That we are all used too.
Asus did not build a fancy UEFI interface for these notebooks it actually looks and works pretty much like what were used to seeing as BIOS.
I am no where close to being able to discuss This UEFI technically. I just know It works and I have been able to learn how work through setting up a disk and clean Installing
This is what a UEFI Clean install of windows 8.1 Pro looks like, yours should look pretty much the same except for yours won't have the unallocated space and probably will have D:\ partition that's the way Asus sends them out.
G752VY-DH72 Win 10 Pro
512 GB M.2 Samsung 960 Pro
1 TB Samsung 850 pro 2.5 format
980m GTX 4 GB
32GB DDR 4 Standard RAM
Z97 PRO WiFi I7 4790K
Windows 10 Pro
Z97 -A
Windows 10 Pro