hi there,

have a look and check his account type is not set to 'administrator', this should be set to 'limited'.

if not and you are using XP he might be using an administrator account you don't know about!


Try booting the computer in safe mode (F8 when booting)

you should either see the administrator account or simply type administrator in the user box. Leave the password box empty.

once in go to the administrator user setting and change the pasword...