Ok. Make sure that the HDD is connected to the SATA3_0 port (Grey). Then, on the PC your using to post here, download the Intel Rapid Storage Technology driver (support for ACHI) from here. (http://www.asrock.com/mb/Intel/H77M/?cat=Download&os=Win764
), unzip it on the USB stick in a seperate directory (i.e RST). Boot the PC and go into the BIOS and put the SATA controller back on ACHI and reboot to Windows setup. When it asks for the drive that you would like, in the bottom left, click Load Driver. Find the RST driver in the RST directory and install it. Once completed, see if you can select the drive then.