Problem with Using chntpw in Ubuntu to reset Windows 7 Password

I tried resetting the password of windows 7 Using chntpw command in Ubuntu . It showed success. But when I try to login from Windows it does not seem to be changed.

I first used live USB of Ubuntu 11.10 and did Try Ubuntu. Then I did:

sudo apt-get install chntpw

And then:

cd /media/Vista/Windows/System32/config
sudo chntpw -u username sam

I followed these instructions and got success like this:

Hives that have changed:
# Name
0 <sam>
Write hive files? (y/n) [n] : y
0 <sam> – OK .

But when I try to login to windows with blank password, I could not log in.

I also tried changing the password and showed success but I could not log in with that password.

Solution 1:

The 0.99.6 version of chntpw is totally disfunctional: https://bugs.launchpad.net/ubuntu/+source/chntpw/+bug/1046622

I struggled more than a hour to find this out.

Try to use 0.99.5 instead, it works for me:

https://launchpad.net/ubuntu/karmic/i386/chntpw/0.99.5-0+nmu1

Solution 2:

To change Administrator password: sudo chntpw SAM. To change another users password: sudo chntpw -u <your-username> SAM Please note the Upper-case of the word SAM

Solution 3:

I had the same problem. What worked for me was using chntpw to unlock the administrator account, which was the only function of chntpw that worked. Then I booted windows, logged in as Administrator, and cleared the users' password with the users app in control panel.