Satellite L840/020 - Cannot enter BIOS after enabling fast boot option

I have a Toshiba L840/020 (PSK8LA-020007) notebook. I recently installed an Intel 330 Series SSD and Windows 8 Pro RTM 6.2.9200 MSDNAA on it and enabled Fast boot option in the BIOS (Boot speed > Fast).
Now I can not get into the BIOS no matter what I do. I tried pressing power button while holding down F2 (as suggested by few other forums) , up on failing that I tried all F keys and Esc, but nothing works. I also tried repeatedly pressing F2 while booting, connected an external USB keyboard and pressed F2 on that , but no matter what I do I cannot get into the BIOS.
When I go to Download section of Toshiba support > Windows 8 64bit, I can also see a BIOS update for my notebook, but when I try to install that I get the following error :
Error
Flash process will be terminated!
Current platform have secure boot feature, it must provide NV storage location by IHISI interface.
Please contact OEM BIOS engineer to add the feature.
Without this IHISI interface, the authenticate variables will be modified or cleared by flash process.
If you understand the risk and still want to flash.
You can add the following setting in platform.ini to ignore error.
[EngineeringErrorDisable]
SkipSecureBootProtectionCheck=1
OK
I didnt change platform.ini and flash, without first seeking help from the community.
Please let me know how to get into the BIOS. Thanks.
null

Hi
Try firstly INS button and then F2 button.
Then you should be able to access the BIOS I recommend disabling the fast boot in the BIOS if you could successfully enter the BIOS.
Regarding the BIOS update.
I checked the Toshiba AU driver page and it seems that the BIOS v6.20 is the same like for Win 7.
I think that the BIOS update should be done running the Toshiba preinstalled system since Win 8 is not officially on the market yet and from my knowledge there are some big restrictions updating the BIOS running Win 8

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