Hope someone can help. I built a new computer (1st one) and moved an old hard drive from my old computer to the new build. I installed a SSD and mirrored them. I can''t get the new computer to boot from the SSD which I really want for the boot up speed. The mirror was successful and all the files appear to be there. When I boot from the new SSD it tells me to install an operating system. Any suggestions.?