Hi, about 6 months ago, my WD Raptor failed due to write failure. So I installed Windows XP Pro on a 160gb WD HDD. I left the raptor in just in the case I might be able to repair it, but never was able to get anything to properly write on it. But the other day I tried taking it out and my Windows XP does not boot without it in nor is it even recognized that it even has an OS installed on the HDD. Does this mean that the Master Boot Record is on this drive? If so is there anyway I can easily fix this problem without a re-install? Please Help, thanks.