I have two hard drives in my system. My C: drive, for my software and a D: drive for games and downloads. My D: drive is not picking up sometimes. It will show in device management but i can't initialize it (IO error pops up) My D: is less than 6 months old and i this has happened to me on other windows installations (so i know it's not my hard drive). I suspect it is my motherboard, but am not certain. Any suggestions?