Remove Windows Passwords with chntpw

chntpw is an easy to use Open-Source Linux program that allows you to Upgrade Windows users and clear out their passwords. It is also used to edit Windows Registry from Linux (although I don't go over that in this video).
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Category:

Howto & Style

Tags:

• Linux
• chntpw
• windows
• password
• security
• SAM

[ThreeWalledBox]

this is the best password crack tutorial I've found so far. very easy to follow and not drawn out in the slightest. Thanks

[metalx1000]

@ThreeWalledBox: Nope problem. But I think there are some versions of Windows 7 that this doesn't work on. But, it still works on most computers I've tried.

[2dulle]

How to add arguments , ie. chntpw -u "username" sam -1 -y ,and is that posible?

Sorry for bad english :) .

[metalx1000]

@2dulle: I once wrote a script that automated it. I believe I redirected the info doing something like this:

chntpw -u "username" sam << EOF

1

y

EOF

[MePotatoe92]

When I do all the steps that you say I still can not boot into windows. I did everything correct. But windows still asks for a password. HELP!

[metalx1000]

@MePotatoe92: I don't think I'll be able to help you. It should work. If it doesn't, it should give you an error message of some kind. As I said to some one in a comment below. I've only had a problem with chntpw once before and that was due to the personal having an optional extra layer of encryption on the SAM file. I guess this is a feature that win7 offers, but chntpw should still work. There are just a few extra steps needed.

[clint0nify]

this is hilarious lol

[ferduos2008]

@metalx1000 Ok, I finelly figured it out, i did the following and cleard the password; Opened Terminal: sudo fdisk -l hit enter sudo mkdir /mnt/windows hit enter sudo ntfs-3g /dev/sda2 /mnt/windows hit enter Go over to Chntpw - write the following cd /mnt/windows/Windows/System32/­config hit enter ls SAM hit enter chntpw -l SAM hit enter chntpw -u "username" SAM hit enter follow the instructions on the screen and restart! =) So did i and it solved my problem. Thanks you r a hero!

[TheRodeBros]

"Today I'm going to show you how great Windows XP is and how everybody should use it. No I'm just kidding." LOL!

[2dulle]

@metalx1000

Thanks.

[Rezamgh]

This is video is awesome, actually saved my ass.

[malkdk]

@MePotatoe92 hey. nope I never got that program to work. it was my dad's computer, and he ended up using a boot cd called "Ultimate Boot CD (for Windows)" that worked. that cd has a built-in tool for resetting passwords too.