کد:
http://utools.com/help/ChangePw.asp
Changing a Lost Domain Administrator Password

If you wish to change or reset only the password for the Domain Administrator user account (MyDomain\Administrator) – without reloading Active Directory – you can use the following procedure. This allows you to regain control of your domain if you forgot the password.
If You Also Lost the DSRM Password

This procedure requires that you know the Directory Services Restore Mode (DSRM) password. If you have also lost the password for the DSRM account (MyComputer\Administrator), you can recover it by using a standard desktop PC lost-password recovery tool:


Procedure

After you have obtained (or recovered) the DSRM password, run UMove to recover the Domain Administrator password.

  1. On the Primary Domain Controller (PDC) boot DSRM and log on.
  2. Install UMove. (If you receive the error message “The system administrator has set policies to prevent this installation,” see below.)
  3. Run UMove.
  4. On the Welcome page hold down the SHIFT key press the F6 key (SHIFT+F6). The Change Password page will appear.
  5. Type the new password for the Domain Administrator account. In the confirmation box type the password again.
  6. Click Next and Finish. The computer will automatically reboot.
  7. After the logon prompt appears wait 30 seconds while the password is changed.
  8. Log on to MyDomain\Administrator, where MyDomain is the domain name. (The name for 'Administrator' may vary by language or if the name was changed previously.)

If the Domain Administrator account was disabled, UMove will automatically enable it.
If the new password fails, reboot into DSRM and check the Event Log for error messages. If UMove was unable to change the password the reason will be written to the Application Event Log.
The PDC Emulator Should Be Used to Change the Password

In order to change the Domain Administrator password, the domain controller should have the Primary Domain Controller (PDC) emulator role. A non-PDC will attempt to forward the change-password request to the PDC. If the PDC is not reachable on the network, the password change request will generate error messages in the Event Log. (If there is a discrepancy between passwords on a non-PDC and a PDC, the password on the PDC will take precedence.)
Unable to install UMove in DSRM

 If are unable to install UMove because of the error message The system administrator has set policies to prevent this installation, you will need to modify a registry value. Run REGEDIT.EXE. Locate the registry key HKEY_LOCAL_MACHINE\System\CurrentControlSet\Contro l\SafeBoot\Option. Change the registry value OptionValue from 3 to 0.
If you continue to receive the error message, see additional workarounds at KB925336.
Spurious Error Message

A yellow warning message may appear in the System Event Log for Schannel. The error message is spurious and can be ignored Event ID 36872





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