How do I reset the Windows XP Administrator password?

"You can use Offline NT password and registry editor to reset it.
You also can use Ophcrack."

"Let me give my 2 cents on this question.
I personally would use using KON-BOOT , it bypasses all windows password checking, so you can boot to windows and change the password.
Its like a live cd that boot prior to windows and tricks it when asked for the password.
Great tool for hacking your own box (you can only change the pass, you can't see the old one)
From the site:

Kon-Boot is an prototype piece of
software which allows to change
contents of a linux kernel (and now
Windows kernel also!!!) on the fly
(while booting).
In the current
compilation state it allows to log
into a linux system as 'root' user
without typing the correct password or
to elevate privileges from current
user to root. For Windows systems it
allows to enter any password protected
profile without any knowledge of the
password.
It was acctually started as
silly project of mine, which was born
from my never-ending memory problems
:) Secondly it was mainly created for
Ubuntu, later i have made few add-ons
to cover some other linux
distributions.
Finally, please
consider this is my first linux
project so far :)
Entire Kon-Boot was
written in pure x86 assembly, using
old grandpa-geezer TASM 4.0."

"I had this problem in the past but I found a way to break the password.

STEPS:

Download the file from here: http://pogostick.net/~pnh/ntpasswd/
Copy all downloaded files in your removable drive (pen drive)
Open a command prompt and write this line:
h:\syslinux.exe -ma h: (replace ""h"" with your removable drive like i,j,G)
Insert a pen drive in your targeted PC and boot this pen drive (legacy must be ON).
Click enter thoughout all the steps until you get an instruction like clear password.
After getting clear password, complete this step and restart your system. Now it will not ask you to enter a password and the computer will start.

Using these steps, I have broken my administrator password many times; it is very efficient."
"I had this problem in the past but I found a way to break the password.

STEPS:

Download the file from here: http://pogostick.net/~pnh/ntpasswd/
Copy all downloaded files in your removable drive (pen drive)
Open a command prompt and write this line:
h:\syslinux.exe -ma h: (replace ""h"" with your removable drive like i,j,G)
Insert a pen drive in your targeted PC and boot this pen drive (legacy must be ON).
Click enter thoughout all the steps until you get an instruction like clear password.
After getting clear password, complete this step and restart your system. Now it will not ask you to enter a password and the computer will start.

Using these steps, I have broken my administrator password many times; it is very efficient."

"Right click on My Computer, select Manage. Select Users under Local Users and Groups in the tree pane, right click on the Administrator and click Set Password...

This obviously assumes that you can log in to Windows though!"