Windows User Account :
The situation is fairly standard a workstation or server, Windows NT4, 2000, XP or 2003, is to reconfigure (e.g. IP address change), but the regular user has insufficient rights to do so. It just happens the day the director is absent, and the user must be able to use their PC in an emergency.
Two cases are distinguished, depending on whether the local account (server or workstation) or domain account (domain server).
Local Account :
If you have lost your windows password. No panic, before the windows screen press [F8] boot into Safe Mode and then click Administrator and not on your account. Normally there is no word or password so the password you set during installation system. A second solution is to boot from the cdrom to install windows and enter the Recovery Console. It should get better, watch this is a reset of the registry, it is therefore your own risk and the system may have trouble privileges.
The passwords for local accounts of all users are stored in encrypted form in a " beehive "Base Registers, namely the SAM file (Security Account M ANAGER), specifically the branch HKEY_LOCAL_MACHINE \ SAM \ SAM \ Domains \ Account \ Users
It must therefore be able to access the SAM file (% systemroot% \ system32 \ config), but in the case of NTFS, it's impossible in DOS (unless you use specialized tools pay, such as those provided by Winternals ). We can eventually reach an NTFS partition by installing another copy of NT, which is quite heavy and requires the free disk space.
It will suffice to start the PC version (reduced) LINUX (yes!), Containing a program (chntpwd) who can access the SAM database (Security Account Manager) located in the NT system partition, and allow to set a new password for the administrator (or any other user).
You can use either the floppy version, or the CDROM version, according to available devices on the PC, since the CD-ROM version is more convenient to use.
Steps to Change User Password From Remote Computer :
It is possible to change the Windows User Account password with the help of a Remote Computer. That means if you have a Remove access to any system then you can change the User Account Password. This is best suitable for Administrators or users who manages WorkStation, Stand-Alone Server or Windows Domain Controller. And the second thing I want to tell you that there is also difference while changing the password. This is possible in NT 4.0, W2K, XP Pro and Windows Server 2003 computer.
For that you also does not need to login in the User Account Database. So that removes the problem of checking the database of the Username. The procedure for that is very simple and it is quiet very useful for that also. From there you will not need to do anything in the User Account Database and also the security of the security accounts manager (SAM). This is the place where your default user account and password is saved on the default logon domain.