I have the same problem and I don't think it's a cable seating problem, though I have tried repeatedly reseating the cables.
My PC was working fine, I rebooted to load a Windows (security) patch and then got this error.
I had previously installed a new HD a few days before and had sucessfully rebotted a few times. This time it failed.
I had also remapped my "D" frive, which was previosuly the factory reset volume, and is now the "Z" drive, making way for the new HHD as the "D" drive. I can't recall whether this was the first reboot since that setting, but am now concerned that the "D" drive itself was used to reboot. Though I think that unlikely, I'm grasping as straws as what might be wrong.
Unfortunalty I can't boot from any other medium.
The O/S is Win 7 SP1
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