I have a dell 5720 laptop. I attempted to change hard drive to Samsung 850 evo ssd. Samsung data migration did not work, nor did ease Us disk copy. The ssd shows up in boot menu and I made sure it was 1st in boot order but it will not boot. If I use windows recovery DVD , it asks for a driver but I have no idea which one, Samsung told me sata driver, but that did not work. I think I may need to do a clean install, but will I have the same trouble? I had to order a new windows 7 install disk, as I only had the recovery one that I burned. Do I need a disk from dell? I'm not sure what else I will need to do a clean install. Thanks for any help!