Ok, well guess what i just built my computer, and had the exact same problem, i think. First off, is bios recognizing the HDD? If so, then your motherboard probally came with a CD, if not stop here. So, if you have CD get to a operable computer and insert disk. Now simply look for the SATA driver on this disk, extract to floppy and insert in your floopy drive. Now when asked to specify mass storage drives, load this. This fixed my problem, and I just got my comp running today