Technical Support Bulletin
TSB2B03F30002R01

   
BIOS setup changes are necessary, if booting from external devices is required (Genuine Windows 8 units)


    Document details:

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 Product:
 
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 Model No.:
 
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 Operating System:
Windows 8 - 32 Bit, Windows 8 - 64 Bit
   more details...  


    Issue:

BIOS setup changes are necessary, if booting from external devices is required (Genuine Windows 8 units).


    Summary:

Genuine Windows 8 units do have new BIOS options called; "Secure Boot" and "UEFI Boot".

These options have to be changed if you want to boot from an external device like an USB stick or a bootable CD-media.
Please change the option "Secure Boot" to "disabled" and the  "UEFI Boot" to "CSM Boot" in order to allow the system to boot from external devices.

Please note:
If your external boot device contains a secure boot key (like Windows 8 or Windows PE 4.00), then you do not need to change anything in the BIOS setup.



    Resolution:

Genuine Windows 8 units do have a BIOS options; called "Secure Boot" and "UEFI Boot".
These options have to be changed if you want to boot from an external device like an USB stick or a bootable CD-media.
Please change the option "Secure Boot" to "disabled" and the  "UEFI Boot" to "CSM Boot" in order to allow the system to boot from external devices.

Please note:
If your external boot device contains a secure boot key (like Windows 8 or Windows PE 4.00), then you do not need to change anything in the BIOS setup.


Procedure to boot from an external device:

1. Power on the system and while the "TOSHIBA" logo appears, press [F2] key to enter the BIOS Setup Menu.
2. Select [Security] tab and set the “Secure Boot” to “Disabled”. (Refer to <Pic.1>)


3. Select [Advanced] tab and go to “System Configuration”. (Refer to <Pic.2>)
4. Set the “Boot Mode” to “CSM Boot”. (Refer to <Pic.3>)
5. Press [F10] key to save and exit.
6. Press [F12] key at "TOSHIBA" logo screen to toggle between the bootable devices and choose the medium which you want to boot from.



Please note:
Once you are finished and you want to return back to normal operation you need to revert the Bios settings:

- Power on the system and while "TOSHIBA" logo is being shown, press [F2] key to start BIOS Setup Menu.
- Select “System Configuration” in [Advanced] tab.
- Set the “Boot Mode” to “UEFI Boot”.
- Set “Secure Boot” in [Security] tab to “Enabled”.

The installed Windows 8 OS will not boot up, if you do not revert the BIOS settings !



    Disclaimer:

Toshiba provides this information "as is" without warranty of any kind, either express or implied, including, but not limited to, the implied warranties of merchantability or fitness for a particular purpose. Toshiba shall not be responsible for the topicality, correctness, completeness or quality of the information or software provided. Toshiba is not liable for any damage caused by the use of any information or software provided, including information that is incomplete or incorrect. Any trademarks used herein belong to their respective owners.


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