Hello, I just added a new hard drive to replace the old one that is apparently corrupted. And I'm not sure what I did wrong. I was told to unplug the power supply and the old hd. Add the new one, and power it back up with the Windows 7 installation dvd. Did that and in trying to change the order in witch it boots to cd-rom, it shows sata hd not present? I don't know why, I replaced the cords in the right place. Do I need to configure it, if so how? Please and thank you.