Reset your Windows password with Chntpw using System Rescue CD

Quick note about using chntpw command to reset Windows passwords. Mostly, I just couldn’t remember what the command line program was or the switches.

Boot to System Rescue CD.
mount the Windows drive RW (mine was RO)
cd to the config dir: cd /mnt/sda1/Windows/System32/config
Backup your sam,security,system,software (just copy them to another directory)

Now run this to list user while in the config directory:
chntpw -l ./sam

And this will run in interactive mode and ask you which user to edit the password.
chntpw -i ./sam

Chntpw can also edit your registry. One time it really saved the day when I was locked out of a computer and something was causing boot to fail. This made it pretty quick to edit the registry in a way that allowed me access to the system again. (then we proceeded to run a bunch of antivirus checks)  By the way, this worked for me on Windows XP and Windows 7.

Great tool!

 

Posted in Linux, PC Repair, Registry, Security, Windows 7, Windows XP Tagged with: , , , , ,
  • Blueking Cx

    Good  tip ! Anthoer way to use chntpw can be found at this page:
    http://blog.daossoft.com/2011/10/26/recover-windows-7-password-with-chntpw-usb-disk/

  • http://twitter.com/ChairsNJ ChairsNJ

    Ophcrack, chntpw can recover or recover windows password.
    http://ophcrack.sourceforge.net/
    How to crack windows 7 password show more workable solutions to reset windows password with password reset disk or password software.

  • marion

    A few days ago, I had met the headache things that I had forgotten Windows login password. The login screen rejected my passwords. I was frustrated because there was very important data on my disk and I couldn’t reinstall the OS. ………….
    However, I fortunately got to know the Reset Windows Password utility, which is a professional windows password recovery tool for us to reset windows 7 password instantly yet no data loss.

  • d

    ophcrack uses rainbow tables and costs for any real functionaltity. chntpw is really the better way for password reset.

  • tazman22

    What is password hint: NO HACKERS ALLOWED ( a book?)