At Build Core script's main interface tab there is a check box for switch to admin.If you have checked this box it is normal that after boot process, PE will ask you to login as Admin or not.You can set the countdown as 0 under this srcipt's additional tab (see the picture) or you may choose to uncheck switch to Admin checkbox to avoid such a delay and question completely.But if you uncheck it, some scripts may not act properly such as Media Transfer Protocol script.