How to reset windows 7 password

1. Boot the system with Ubuntu boot CD or Bootable USB

2. Click "Try Ubuntu" and wait for operating system to load.

3. On the Taskbar click "Place" and select your hard drive for
   windows7. This will automatically mount the windows drive.

4. Click on Windows folder and then System32 folder.

5. Find a file called "Utilman.exe", right click and rename it as
   "Utilman_old.exe"

6. Find a file called "CMD.exe", right click on file and select
   "Save a copy" and then rename the copied file as "Utilman.exe".

7. Restart the Ubuntu and boot with windows.

8. Once windows loaded and you are greeted with login screen, click
   the icon for "ease of access" at left bottom. Once you click 
   instead of ease of access come up with command prompt.

9. In the command prompt type "net user user_name new_password"
   where user_name is name of the account you are tying to log into 
   and new_password is your new password.      

   Example : account name is tom and i want new password to be
             Tom123 
                     new user tom tom123.

10. Log in with new password