Why Disable BIOS memory options such as caching or shadowing ? and how to disable it in bios ?

Please do not do this.

What? Please ask a question. What are you trying to do?

i think that with f10 gets you into bios, check what offers because the bios of laptop is very typical you dont have many choices as desktop bios.

hope this will help

UNMOUNTABLE_BOOT_VOLUME - Windows is completely corrupted and the BIOS can't load it.
Just load the default settings in the BIOS and then reinstall Windows using the recovery cd that came with it when you bought it.

you need to get the os reinstalled.

it's about the processor level caches
but also might be a bad memory slot (RAM)

resetting the bios is a good choice, maybe this will helpe either

If you are using an AGP or PCI graphic card try disabling the on board video adapter from BIOS.

Ensure that you have the latest drivers for this video card installed.

If the video adapter is using shared memory, then you may have a faulty RAM module.

Reinstall Direct X and any graphic acceleration software.

Go to BIOS and disable memory caching and shadowing options, this usually does not solve the problem, but you never know.

Contact video card or Motherboard manufacturer, there may be an issue between video adapter and your motherboard, or the specific software that you are using. In that case manufacturer may require to download a patch.

Since it is a Toshiba Tecra if you are not worried about losing data on the laptop you can try turning on the laptop and start pressing the zero key. It should give you the option to restore your laptop if you haven't deleted the restore partition on the laptop.

try pressing F2 and DEL key rapidly after switch on until you get a BIOS or password request