Resettare la password di un utente Windows 7
Updated at: 22/01/2016

Per resettare (o cancellare) la password di un utente in windows (testato solo con 7), se non si ha la necessita di recuperare la precedente, si può fare tutto usando una distribuzione live di linux, ad esempio Ubuntu Live. Guida di riferimento da cui sono stati estrapolati i punti: http://www.isunshare.com/windows-7-password/how-to-reset-windows-7-password-without-reset-disk.html Step 4: Install Chntpw.
  • 4-1: Press Ctrl + Alt + T to open a Terminal window.
  • 4-2: Type sudo apt-get install chntpw and click Enter.
sudo apt-get install chntpw
The process of download and installation would go on without further assistance. Once it’s finished and your back at the regular prompt, simply type exit and hit Enter. Step 5: Reset Windows 7 Password.
  • 5-1: Mount the hard disk partition where Windows is installed in according to access all the removable drives and hard disk partitions from Places menu.
  • 5-2: Mount the drive with Windows folder. Open all partitions to find the drive with Windows folder. When you find it, make a note of the drive’s label that appears in the menu bar of the file browser.
  • 5-3: Open Applications menu from panel, and select Terminal from Accessories menu. In Terminal window, enter cd /media command, and then list all mounted media drives with ls command.
  • 5-4: Navigate to drive that contains Windows folder.
Type: 
cd <hard drive label>
cd Windows/System32/config
Pourpose: Open config folder and then you can make changes to Security Accounts Manager (SAM).
  • 5-5: Read Windows user account credentials and make changes to saved passwords with running chntpw tool.
sudo chntpw SAM
The sudo chntpw SAM command can only make changes to Windows admin account password. If you want to change standard user’s password, use the switch –u followed by correct user account name. 
sudo chntpw –u <user account name> SAM
If you’ve changed the user account password, reboot your system, and exit Ubuntu Live USB. If you’ve just reset the admin password, Windows will not prompt you to enter the password. However, if you changed the password, please log in to Windows with new password.