I have a drive that is failing a self test so Dell sent me a replacement. I did a full backup of my old drive onto my external USB drive and validated it. I put the new drive in, booted with the acronis disk. I then restored the partition, making it the active partition, along with the MBE. It says it was successful. And, it won't boot. I made the ISO CD and put it in and it won't boot from that disc. HELP!!!