Check Toshiba's official website or contact their support directly. They might have specific tools or software for generating challenge-response codes for their products.
9 Sept 2018 — Switch on the notebook, when the boot logo appears press [F2]. “Password=' will be display. Press keys in the order [CTRL], [TAB], How to Generate Response Code for Toshiba Laptop toshiba challenge response code generator exclusive
If a machine logs an administrative bypass using an unauthorized code sequence, it can instantly void existing manufacturer warranties or service level agreements (SLAs) with office equipment vendors. Legitimate Alternatives for Office IT Admins Check Toshiba's official website or contact their support