The administrator may create graphs, too. The other account is guest with the empty password. Guests cannot change this password, use the MIB compiler and are not allowed to perform SNMP set command. The only limitation is that all graph settings are destroyed on logout or the session timeout. It is strongly recommended to change the administrator password right after the installation.
Administrator can delete the guest account.
Be sure that you are not logged in as guest . Guests are not allowed to change their password. From the main menu image select Options Password. Enter the current password to the Old Password line. Click the Change Password button.