Clean Install is covered in this
threadYour system came originally set up UEFI GPT, your WIN 7 SP1 ISO needs to be set up for 64 bit Boot. Yes SP1 is required.
Use Rufus to create your UEFI Install USB thumb drive. All this is covered in the linked thread.
you must have formatted your hard drive NTFS? or your not using a win7 SP1 ISO or disk?
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