I had a new hard drive installed because the original one had a conflict somehow and would not recognize my usb ports. After the new drive installation, I was able to access my files on first drive. Installed Norton System Works 2004, including Norton Go Back on new drive. I installed a update from Microsoft, (I thought to be SP2). and my machine never rebooted to windows after that. Spent hours on line with tech24, and finnaly they decided I should reformat the new Master Drive. After that, and installing Windows XP Pro on formatted drive, windows did not recognize the other drive. The Drive shows up In disk management. The Drive shows up in Bios, and at startup. I saw somewhere that Go Back changed the MBR, and that was the problem. Does anyone know how to restore the MBR and not lose all my files on the old drive. I Do not want to reformat!!! If I have to, I will take the drive to someone to recover, but seems like there is a simpler way.