How to reset windows administrator password:
Sometimes you may need to reset or recover a Windows administrator’s password to perform some administrative tasks. The situation maybe you forgot the password and the server is out of domain or out of network.
I faced this problem many times. I personally used Offline NT Password & Registry Editor many times on Windows 2003 servers and Windows 2008 Servers. The good thing is it takes hardly 5 to 10 minutes to remove a password for any local account and the ISO supports many servers hardware types.
Can be downloaded from http://www.chntpw.com/download/
How to remove a password:
Boot the system using the ISO. Follow on screen instructions and do not forget to save settings in the final stage.
After booting from ISO, you will get the above screen. Press Enter.
Enter 1 in the above screen
Enter Y (This step is because of the Windows was not shutdown properly).
Select 1 and Enter to reset Password.
Select the RID of user account to reset password.
You will get a message like above: Password Cleared!
Now Enter q and y to quit and save the information. Now boot to Windows and you will find that the password is cleared for Administrator.!!!
This process will not work if the drive is encrypted.