I'm pulling my hair out here.
Windows 10 x64 OEM disk
Motherboard Gigabyte GA-z170x-Gaming 7
Drive 0 (C drive) Samsung SSD 850 EVO 500GB
Problem: Can not install Windows 10 x64 OEM disk onto a clean Samsung SSD 850 EVO 500GB using a GPT partition. I've tried it with two clean SSD's and both times Windows 10 was installed on a MBR partition.
Prior to both installations I verified that in the bios "WIndows 8/10 Features" was set to "Windows 8/10" and verified that "CSM Support" was set to "Enabled"
I inserted the disk and hit F12 to change the boot order. The SSD was detected and the DVD drive was detected twice ... one as UEFI and one as not UEFI.
I installed Windows 10 from the DVD drive that was detected as UEFI.
My understanding that Windows 10 then should have formatted the SSD as GPT but it didn't ... it installed on a MBR partition. During the installation I wasn't presented with an option of HOW to format ... I was just given the option to format.
How do I get Windows 10 to install on a GPT partition on my SSD?
Is there a way to change the partition from MBR to GPT?
I now have 2 identical SSD's ... how do I erase one of them?