I just finished building my wife's new computer with a new 1TB HD and SSD. Her old drive was a 250GB which I cloned over to the SSD. I changed the SSD to be the default boot through the BIOS and removed the old drive. Now it's saying there is no boot device and the only way to boot the computer is placing the drive back in. What am I doing wrong? I used Macrium Reflect to clone the HD onto the SSD..