Still doubt if bios setting will affect the bios accessibility except than giving it password...

The windows boot manager you mentioned, its like something safe mode, use last know config, etc like that ?

What about if press other F-keys ?
The bios reflash, I would take it as last resort..

and now the question, which setting in bios affect that

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Added on June 14, 2010, 11:24 amDear Toshiba users,
It seems lately nearly all Toshiba notebooks are equipped with both 32-bit Operating systems (Windows for this case) as well as 64-bit Operating systems (which are installed into the hidden HDD partitions of each notebook). Notebook sellers prefer to start up the whole notebook with 32-bit OS , mostly because of the shorter time required to boot the whole system. Since 32-bit OS can only support around 2.98GB of RAM, those who bought Toshiba notebooks with RAM upgrades (to 4GB RAM- models include Satellite L510, Satellite Pro L510, M500, M300, T130, F60 etc.) will not be able to fully utilize the RAM. This can be settled by converting your 32-bit OS to 64-bit OS. You can do it via recovery from the Toshiba hidden partition itself, or via the 4 system recovery discs that you burnt when you 1st got your notebook 

The guide to Toshiba's HDD system recovery can be found here: cdgenp01.csd.toshiba.com/content/.../PMA500339010_web.pdf

Generally, it would be easier to conduct the recovery from the Hidden partition than the recovery discs (noneed to keep on changing discs XD )
In general, the steps involved are:

1. Make sure you backup all important files, EVERYTHING will be reformatted (except the Hidden Partition) when you recover your system. Noneed to worry about drivers and Toshiba programs as they are included in the Hidden Partition/Recovery discs.

2. Plug in A/C adapter and if possible, plug in the battery just in case of blackouts (in Malaysia) XD

3. Shut down your notebook.

4. Press and hold the "0" and the "power" button. A window will appear asking you whether you want to load a 32-bit or 64-bit windows. The remaining will be easy, just choose the "recover to out-of-box state" (Actually noneed to change anything, as for the subsequent windows, the initial ticked box will be the recommended one)  XD

5. Partition reformatting will commence. Initiate the next step.

6. After that, leave everything to your notebook, it will restart on its own for quite a few times (to install the drivers and programs), may take up to 1-2 hours depending on your system. You will be configuring your OS in no time.

I guess that's all, hopefully this will help those who wanted to switched to 64-bit OS i.e. Eguy1314 ^_______^

** Be warned, Toshiba's feather touch buttons may become unresponsive after switching, still looking for answers for that one, it seemed there are no drivers for these buttons zzzzzzzzzzzzzzzzzzzzzzzz

Anyway, Do refer to the link above for more elaborated details 
Best of luck!

Use this method ?
But your data on C:\ will be gone..

Just got my white Sony Vaio E-VPCEA36FG
Pretty happy with it except for the speakers.
The speakers are so damn crappy its worse than a cheap handphone speakers... zzzz

Grats on your purchase! Quite a powerful machine I would say ~
Err... wrong thread? 
Anyway, Sony Vaios' strong point was never the speakers 
But you can always improve their audio quality (significantly) by buying external speakers 

The Vaio's HD5650 is underclocked though...

The same thing with the L645 ?

Got one L645 user on the overclocking HD5650 thread, says his one is 450Mhz...
While the Acer one is 550MHz, and with the HD6550M, its 600MHz...