I am having some problems getting my hard drive cloned. I have two hard drives, let's call them A and B. A is a hard drive that I have had for about 6 years and is starting to show it's age. My friend gave me B, a gently used one. Both drives are the same size, 1 terabyte. My original plan was to make a disk image of A onto an external drive I have which is 2 TB. I would then take this image and slap it onto B. After a few tries, the disk image was set up. However, once I swap the two drives I get a blue screen telling me that it can't start. I have tried plugging them both into the same system, but I get the same result. What can I do to fix this?