Hey man, I have the same situation as you. I just recently bought a new hard drive for my laptop and also bought a usb drive enclosure to home the new hard drive. I bought Norton Ghost 9.0 and made a copy of my main drive to the new drive. I swapped the drives out and it booted fine and then when I logged in it waited then logged me off and I couldn't sign in. It truly sucks and it's very frustrating. I have turned everywhere and I can't find out why it does this. If you've found anything tell me. Thanks.