I have Ubuntu (latest version) installed on a Toshiba laptop which has UEFI, and need to update the BIOS.

Toshiba provides BIOS updates as EXE files. I do not have Windows as dual boot, so I tried to create a live USB with freedos installed and boot from that, to then run the EXE file. I have tried multiple times now using multiple methods, and the USB drive will not boot. I even tried to create a live USB with Win10 and that failed also. The USB drives boots just fine on another laptop that does not use UEFI, but not on the laptop that does. So I presume that the USB drive is not being set up correctly to be recognised as bootable on the Toshiba UEFI laptop?

This question is linked to an earlier question (EXT4-fs error on Toshiba Tecra with WD SSD) so you can see the methods I tried (with thanks to @heynnema). These include using UNetbootin and mkusb.

Any help would be much appreciated as I really need to update the BIOS.

  • You can create a Windows installer drive, that can boot both in UEFI mode and BIOS mode according to this link.
    – sudodus
    Dec 30, 2019 at 6:25
  • You cannot expect FreeDOS to boot in UEFI mode. But you should be able to go into your UEFI/BIOS menus and switch the boot mode from UEFI to BIOS (alias CSM alias legacy mode). And then your drive with FreeDOS should be able to boot.
    – sudodus
    Dec 30, 2019 at 6:40
  • Rufus has an image option for Windows To Go. This offers a Full install of Windows on bootable USB. The process is slow and may not work on all flashdrives. A 15GB drive may be OK if you just want to run an EXE file. Windows will soon start asking you to register it, but it will still mostly work. I recall Rufus only gives a UEFI option. Jan 1, 2020 at 7:12

1 Answer 1


You can try toggling the UEFI setting on your BIOS. Keeping in mind when you update the BIOS, you may have to change the UEFI settings again.

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