If its not allowing you to log on, you have a password somewhere. If you
somehow managed to get one set, or your account is disabled.......
What username are you using? If its just a regular user, try entering
Administrator and leaving the password blank. For XP Home, you'll have to
boot the PC into Safe Mode to access the built-in Administrator account. If
you can get in via the Administrator account, you can reset the password on
the other account, and/or check to see if its disabled.
If that doesn't help you resolve your issue, you can also reset the user
password using various online tools.
EBCD is a collection of utilities that, among other things, will allow you
to reset the Administrator, or any other user's password.
http://ebcd.pcministry.com/
There is a also a stand alone version of the password changing tool
http://home.eunet.no/pnordahl/ntpasswd/
--
Doug Knox, MS-MVP Windows Media Center\Windows Powered Smart
Display\Security
Win 95/98/Me/XP Tweaks and Fixes
http://www.dougknox.com