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I've been trying to achieve this for a while now: http://computernetworkingnotes.com/xp-tips-and-trick/remove-administrator-password.html

However i am running windows 8, and i'm not sure this would work. Can i use Ubuntu to fix.

thanks in advance

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Yes, you can use Ubuntu.

First you need to install chntpw, in a terminal type:

sudo apt-get install chntpw

Once Ubuntu is loaded, mount your windows partition (usually it will auto mount if you are in a file manager and click on it's icon).
The newly mounted drive will likely be mounted to a point with the following path:

/media/<your user name>/<your drives name>

In a terminal use the cd command to navigate tot the above directory and then cd again to navigate to 

Windows/System32/config

Now run:

sudo chntpw -l SAM
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  • Can you please guide me further with the steps as i am new ubuntu user. Where do i type this: sudo apt-get install chntpw? I can't boot windows on my PC. Do i download ubuntu in my USB/CD, then run ubuntu and type it? thanks
    – Amaru
    Dec 13, 2013 at 13:14
  • While it's tempting to tell you to download and install Ubuntu because it's, well, Amazing, and most people like it much better than Windows 8. In reality you can just download and make a GNU/Linux cd with chntpw already installed such as Knoppix or linux. How to make a bootable USB / CD / DVD is a different question that has been written about extensively and can be easily searched for.
    – virtualxtc
    Dec 13, 2013 at 16:35
  • Right! I just figured that out! I'm actually stuck where i have to mount my partition/OS drive.cd /media/disk/WINDOWS/system32/config/
    – Amaru
    Dec 13, 2013 at 16:38
  • lucky for you I was just editing that part of my answer ;-)
    – virtualxtc
    Dec 13, 2013 at 16:41
  • Right! I just figured that out! But i can't seem to mount my drive. tried different variations of /media..etc but always get the same message
    – Amaru
    Dec 13, 2013 at 16:46
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I've similiar suggestion,you can use what called NTPasswd.it's linux based and it's small only around 3 MB.Make a booatble flashdisk with it and you can remove any user or admin password in any Windows

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  • This is the software included in my initial message. I tried booting it but it does not retrieve and partition. I can't seem to go further.
    – Amaru
    Dec 13, 2013 at 13:07
  • What i really do are (you'll need Windows where you can run Apps with admin privileages) 1-Download it from the real source 2-Extract it to the bootable FD 3-Using CMD with Admin priv. j:\syslinux.exe -ma j: (let say J: is your flashdisk path) 4-Unplug the USB then boot it up
    – Tommy Aria Pradana
    Dec 13, 2013 at 13:16

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