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 :
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     
open backtrack---> Privilege Escalation --->Password Attacks---> Chntpw
After type following command:
chntpw –i /mnt/hda1/windows/system32/config/SAM
After type 1 and type username: administrator select 1 option to clear     password
Video demo---> http://www.youtube.com/watch?v=D1LnAQcKtbM