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Tue, Dec 04, 2007 11:09 pm

Reconfiguring IP Interface for DHCP from the Command Line

The IP address on a Windows XP system can be changed from a static value to a DHCP assigned IP address from the command line using the command below (presuming you wish to change the IP address for the interface "Local Area Connection", since you may have multiple or differently named network connections).

netsh interface ip set address "Local Area Connection" dhcp

You can also set the DNS servers from the command line using the command below.

netsh interface ip set dns "Local Area Connection" dhcp


  1. Configure TCP/IP from the Command Prompt
    By Daniel Petri
    Petri IT Knowledgebase

[/os/windows/commands] permanent link

Tue, Dec 04, 2007 10:48 pm

Resetting Password with Offline NT Password & Registry Editor

The date on a repaired laptop I had returned to me, after a motherboard problem was fixed, was January 28, 2150. The laptop is running Windows XP Professional. I knew the password for my normal user account on the laptop, but couldn't remember the password for my administrator account on the system. I downloaded Offline NT Password & Registry Editor in ISO format. After extracting the .iso file from the .zip file I downloaded, I created a bootable CD from the ISO file. I booted from the boot CD and saw the following.
Disk /dev/sda: 80.0 GB, 80026361856 bytes

Candidate Windows partitions found:
 1 :            /dev/sda1   76316MB BOOT

Please select partition by number or
 q = quit
 d = automatically start disk drivers
 m = manually select disk drivers to load
 f = fetch additional drivers from floppy / usb
 a = show all partitions found
 l = show propbable Windows (NTFS) partitions only
Select: [1] _
I hit Enter to take the default option of one for /dev/sda1. I then saw the following.
Selected 1
Mounting from /dev/sda1, with filesystem type NTFS

NTFS volume version 3.1.

   Step TWO: Select PATH and registry files
What is the path to the registry directory? (relative to windows disk)
[WINDOWS/system32/config] : _
Since WINDOWS/system32/config was the correct location, I hit Enter and had the opportunity to select the password reset option by hitting Enter again.
Select which part of registry to load, use predefined choices
1 - Password reset [sam system security]
2 - RecoveryConsile parameters [software]
q - quit - return to previous
[1] : _
For step 3, "Password or registry edit", I had the option to "edit user data and passwords", which I chose by hitting Enter.
<>========<> chntpw Main Interactive Menu <>========<>

Loaded hives: <sam> <system> <security>

  1 - Edit user data and passwords
  2 - Syskey status & change
  3 - RecoveryConsole settings

  9 - Registry editor, now with full write support!
  q - Quit (you will be asked if there is something to save)

What to do? [1] -> _
I was then presented with a list of the local accounts on the system. Those that were disabled or locked were marked as "dis/lock". I chose the administrator account for which I wished to reset the password and was presented with information on the account and the opportunity to blank the password, which is the option I chose.
Failed login count: 1, while max tries is: 5
Total  login count: 68

- - - - User Edit Menu:
 1 - Clear (blank) user password
 2 - Edit (set new) user password (careful with this on XP or Vista)
 3 - Promote user (Make user an administrator)
(4 - Unlock and enable user account) [seems unlocked already]
 q - Quit editing user, back to user select
Select: [q] > _
I then saw "Password cleared!". I then hit "!" to quit modifying accounts and then "q" to quit. At the next step, step 4, you will be asked to confirm whether to actually write the changes to disk. The default response is "n", so you need to hit "y" to actually apply the changes you've requested. You will then see "***** EDIT COMPLETE *****". Hitting Enter will give you a Linux shell prompt of "$". You can then reboot the system; remove the CD so the system won't attempt to boot from it again.

When the system booted into Windows XP, I tried logging into the administrator account. I saw the message "Your password has expired and must be changed." I entered a new password and was able to login to the administrator's account.

[/os/windows/utilities/sysmgmt] permanent link

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