Find password from Sam file _ password recovery strategy

Find a password from the SAM file
　
Using special software, from the local system or remote system Sam files, using a password dictionary or brute force method to find out the login password. This method can find out what the original username and password is, but depending on machine performance, it may take a long time.
This kind of software is known to have L0phtCrack (LC), LCP and Saminside Pro, three software requires administrator permissions to install, if there is no administrator rights (login password lost), how to install? You can use DREAMPACKPL to get into a Windows installation, or start the software with Bart PE or Windows PE, although l0phtcrack (LC) does not work in this environment.
　
Advantages: It is important to encrypt data with EFS without destroying the original system password.
Disadvantage: Slow speed can take days or even years.
　
Here are a few simple ways to use software
L0phtCrack (LC)
Lcp
Saminside Pro