you might try this:
In XP Pro, when the Welcome Screen appears, enter Ctrl+Alt+Del (twice)
Use "Administrator" as the User Account and assume no password.
In XP Home, boot the computer into safe mode. Select the Administrator
Account assuming no password.
When logged into Windows using the Administrator account go to START>RUN and
type
control userpasswords2
select your username and click "Reset Password"
Then look at this article after resetting your password.
How to create and use a password reset disk for a computer that is not a
domain member in Windows XP
http://support.microsoft.com/default.aspx?scid=kb;en-us;305478
How to create and use a password reset disk for a computer in a domain in
Windows XP
http://support.microsoft.com/default.aspx?scid=kb;en-us;306214
if this doesn't work for you, try
http://www.winternals.com/products/repairandrecovery/erdcommander2002.asp?pid=erd
if you don't want to format the above link will fix the problem, but will
cost money.
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