I built a brand new system and all is working, I plug in my external optical drive and place in windows 10 disc. I get as far as to where I choose my install location, My hard drive does not come up on the list. I have ensured that my hard drive is s installed correctly and made sure it is not faulty. My hard drive is a 3'5 2TB seagate, It is blank When I get to the windows setup I click "custom setup" and something named Driver 0 Allocated space 3.9GB appears but I do have 2TB hard drive installed but does not show up in the list. As I said this PC is brand new, built it myself.