http://sophiakunii.wordpress.com/2011/08/16/%E5%BF%98%E3%82%8C%E3%81%9Fadministrator%E3%83%91%E3%82%B9%E3%83%AF%E3%83%BC%E3%83%89%E3%82%92%E5%A4%89%E6%9B%B4%E3%81%99%E3%82%8B%E6%96%B9%E6%B3%95/
http://www.daossoft.com/knowledge/use-offline-windows-password-registry-editor-to-recovery-windows-password.html