Sounds like you on a run of really bad luck. What OS are you trying to install? Have you read this thread
http://rog.asus.com/forum/showthread.php?59224-Install-Guide-for-Windows-8-1-on-G751-freeDOS-(no-win...You may not understand UEFI, your usb/dvd needs to be booted UEFI. On boot up hit the Esc key and select the UEFI USB/DVD and then complete the windows install. You shouldn't have to change anything in your BIOS. For Windows 8 hard drives should be AHCI system should be UEFI Secure boot enabled CSM disabled. after the install your SSD should be the 1st boot. If you need to boot a DVD or USB you can just hit the Esc key to get that boot menu for one time use.
It is also advisable to remove your data drive before you install windows to your SSD. You want to make sure that your EFI partition gets on your SSD
If you trying to install windows 7 you'll have to look that up most to the windows 8 driver will work but not all there are some that require specific window 7 drivers
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