Did you make sure it's formated NFTS and not FAT32
Would you happen to have a USB drive plugged into the computer? I have had this happen before as well due to that... it's weird.
Had the same problem, I had to disconnect all drives and just do the install with just the SSD connected (Intel 510 120gb).
The install worked fine after that, I connected the drives after shutting down and windows discovered them on boot up.