update the bios without operating system

[Joel_57]

how update the bios if i do not have [strike]operative[/strike] operating system? the reason is because i formated the hard disk, the hard disk had windows 8.1 but now is completly clean. i try install ubuntu but when i did it, i discovered that the option of CMOS or legacy mode is not avaliable. i tryed to install again the windows 8.1 but was a fail. i need to install another [strike]operative[/strike] operating system. my computer is a toshiba satellite c55t. please help me is a emergency

 

[bignastyid]

Which exact model do you have as there are multiple sub models of the c55t. However the instructions for updating the bios will be on toshibas website.

 

[SuperSoph_WD]

Welcome to the TH Community, Joel!

I'd definitely agree with @bignastyid about checking the laptop manufacturer's official website for any guidelines on how to flash BIOS (update it). You don't need a working OS on the laptop itself to update BIOS, however, you will most definitely need another working computer (PC or laptop) to create a bootable flash drive with the latest BIOS version downloaded from the official product page of your laptop's model.

Give it a try and let us know if you have more questions.
SuperSoph_WD

 

[Phillip Corcoran]

As far as I know, Toshiba only has BIOS updates in the form of a Windows utility (an 'exe' file), at least that's all they had for my five-year old Satellite. No DOS utility was available.

 

[bignastyid]

Toshiba does have disc based update options.
http://support.toshiba.com/support/modelHome?freeText=1200005637&osId=26