Locate the downloaded file (typically a compressed zip folder or a direct installer). Right-click the .exe file and select .
The most common method for the C660 is through a Windows-based utility. Drivers & Software Support | Dynabook toshiba satellite c660 bios update
Users have reported encountering an "BCPSYS block signature was not found. Error Code: -100" when trying to update from an older version (e.g., 1.50 ) to a newer one (e.g., 1.70 or 2.00 ). This often indicates a mismatch between the BIOS vendor (e.g., AMI) and the flash tool (e.g., one designed for Phoenix BIOS). Locate the downloaded file (typically a compressed zip
If you choose to proceed, take your time, respect the power requirements, and keep a bootable recovery USB ready. With the right preparation, updating the BIOS can breathe new life into your Satellite C660’s compatibility and performance for years to come. Drivers & Software Support | Dynabook Users have
This is the easiest method if your computer boots into Windows.
Download the latest version (common versions for this series include depending on the specific sub-model). 3. Run the Installation Double-click the downloaded file within Windows. Follow the on-screen prompts from the Toshiba BIOS Update Utility The computer will shut down and restart automatically. Do not touch any keys until the process is finished. 4. Load Setup Defaults Once the update is complete and the laptop restarts:
A sudden freeze or hang during the BIOS flashing process is a serious situation. One user reported a hang while updating a C660-17j , and after waiting over 30 minutes, they were forced to shut down by removing the battery, which corrupted the BIOS and left the laptop unbootable.