Recover vista product key from backup hard drive


Feb 23, 2010
Hello, here is my problem. I copied my hard drive using the windows backup program. Is there any way i can recover my vista product key from the backup hard drive? The reason i need to is i installed a new mobo/cpu and used a friends copy of vista to reinstall because i didnt have a disk and lost my key but had an activated windows. i tried magic jellybean finder but it wont let me load the hive. What would i have to do to get it to work if it all possible.