(email address removed - do not post your unmunged email address on
Usenet; it will get harvested by spammers. See this link for explanation:
http://www3.telus.net/dandemar/munad.htm)
Your post is unclear - is this a Windows password or a BIOS password? Do
you get to the Welcome Screen? Assuming this is a Windows password:
If you have forgotten your password, if you have another user account with
administrative privileges you can log into that account and change your
original user account's password from the User Accounts applet in Control
Panel. If you don't have another account like this set up or don't have
the password to it, you'll need to log into the built-in Administrator
account. In XP Home, boot the computer into Safe Mode. Do this by
repeatedly tapping the F8 key as the computer is starting up. This will
get you to the right menu. Navigate using your Up arrow key; the mouse
will not work here. Once in Safe Mode, you will see the normally hidden
Administrator account. The default password is a blank.
In XP Pro, you do not need to go into Safe Mode. At the Welcome Screen, do
Ctrl-Alt-Del twice to get the classic Windows logon box. Type in
"Administrator" and whatever password you assigned when you set up
Windows.
If you reset the built-in Administrator account's password in Home or have
Pro and don't remember the password, use NTpasswd to change the built-in
Administrator account's password to a blank.
http://home.eunet.no/~pnordahl/ntpasswd/
Then go to the User Accounts applet in Control Panel and set passwords
that you will remember and make other desired changes.
And know you also know why someone who is only 6 years old is way too
young to be left unattended at the computer. If you let him on again, make
him his own Limited user account where he can't do that kind of damage.