models: All from 2005 to 2017 
Note: The Challenge and Response Code makes it possible to bypass the BIOS password. Clearing must be done in the System Setup (BIOS). 

•Switch on the notebook, when the boot logo appears press [F2]. 
•"Password=" will be display. Press keys in the order [CTRL], [TAB], [CTRL] and [ENTER]. The Serial number and Challenge code will be displayed. 
•Take a picture of it, and send to me
•Do not switch off the laptop or restart, cause challenge code will change !
•U will get response code, type it, and ENTER
•Go to password case and type ( ENTER then SPACE then SPACE then SPACE ), It will disable the security.
•Save changes.

All Toshiba models Unlock Till 2017 by " Challenge/response Code "



    Laptop Bios Unlock Service​