Easy way would be to use windows PE and install the harddrive in a different computer then use the program locksmith the come with (Windows PE) but try this tool at( http://www.loginrecovery.com/) never use it always use edr commander or linux boots disk to recover the password but heard it work There are aso Linux boot disks that have DOS and NTFS filesystem drivers and software that will read the registry and rewrite the password hashes for any account including the Administrators.