I recently built a computer for a friend, using a core i5 3570k, g.skill sniper 8 GB of ddr3 ram, EVGA Gtx 560 DS, PC Power and Cooling 500w PSU, ASUS mATX z77 mobo, and a Cooler Master 212 Evo. He wanted to me take his hard drive from his old computer, with windows 7 installed, and put it into the system as the main drive. Unfortunately the computer now boots up to the "Starting Windows" screen, then freezes, and BSODs. I can load up the bios no problem, and the temps look fine (CPU at ~35°C), and the CPU voltage is at 1v. I think it may be crashing because the software wants to recognize the computer as the old computer that the Hdd used to be in, but I could be wrong. In addition, the windows failed start up screen comes up ("Windows failed to start. A recent hardware change may be the cause. Etc...") and when I hit "repair computer" the repair utility runs, but is not successful. Any advice?