You say re-setting her *XP* password, but do you really mean re-setting her
If you are re-setting the local XP password, how are you doing that?
Assuming you actually meant domain password, then:
If a user's password is continually being locked out after a password
change, that usually indicates that the old password has been cached
someplace and something is trying to auto-reconnect with the old password.
A second PC is a common cause: has the user left another workstation logged
on someplace with her old password? It will attempt to re-connect mapped
drives etc with the old password and lock out the account.
Another place is in a wireless profile where old passwords may be stored.
Basically, the user needs to remember where she has stored her old password.