How to Hack Windows Administrator Password?

Sometime we forget our administrator password and we want to access the machine but we do not know their password so we have 2 methods to logon this machine:
1. Safe mode
2. with Help of bootable software
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1. Safe mode
Press F8 Button when windows start after select Safe mode and click yes and go to run type cmd. And type following command.

C:\> net user administrator 123
note-->here 123 is the password of administrator
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2. with Help of bootable software
We can use following bootable disk images:we can easily crack the password of administartor using bootable disk.
following are bootable disk
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• Offline NT Password & Registry Editor
•  Backtrack 4 DVD (Back4.iso)

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• Offline NT Password & Registry Editor: it actually deletes your password allowing access to Windows without any password.

Tested with the following: NT 3.51, NT 4, Windows 2000, Windows XP, Windows 2003 Server,Vista and Server 2008.As far as I know, it will work with all Service Packs (SP) and all editions (Professional, Server, Home etc) Also, 64 bit windows version (XP, 2003, Vista, 2008) should be OK.

Feature’s:

• Very fast password cracking tool
• No access to Windows or knowledge of old passwords is needed
• Program is completely free and open source, which means it will most likely stay free
• Works with Windows Vista passwords and Windows XP passwords (and more) Program's ISO image is much smaller than those of other password recovery tools
• No installation in Windows is required making this program an easy alternative to many other password recovery tools.

Download Offline NT Password & Registry Editor bootable disk-->
http://pogostick.net/~pnh/ntpasswd/
http://pogostick.net/~pnh/ntpasswd/cd100627.zip

• Backtrack 4 DVD (Back4.iso)

Hack the Windows administrator Passwords password with Bactrack 4 DVD it is also the bootable disk
Steps for Hack the Windows administrator Passwords password with Bactrack 4 DVD :

1. Burn Backtrack 4 iso in DVD and boot from DVD and after start backtrack with
   username: root and password: toor and then type command startx     
2. open backtrack---> Privilege Escalation --->Password Attacks---> Chntpw
3. After type following command:
4. chntpw –i /mnt/hda1/windows/system32/config/SAM
5. After type 1 and type username: administrator select 1 option to clear     password

Video demo---> http://www.youtube.com/watch?v=D1LnAQcKtbM