Dinger is the password for you actual computer or the password for you internet?
If this is only for your internet you should be able to change it, at least according to this page;

https://setup.bellsouth.net/wizlet/P...comePrepare.do

If it is the actual computer password try the steps here;
http://www.kellys-korner-xp.com/win_xp_passwords.htm