boot device not found --please restart system
Toshiba boot fixed
toshiba bootable device not found fixed


this is common settings in Toshiba laptops , actully we have to disable secure boot and change boot mode to UEFI .

it is highly recommended that we reset bios to default first , so any setting which is causing problem and making things complicated can be eradicated.


for creating bootablel usb you can find these videos useful .

create bootable usb using terminal linux
[ Ссылка ]

creating multiboot usb using ventoy
[ Ссылка ]

creating bootable device using Rufus :
[ Ссылка ]

What is Unified Extensible Firmware Interface (UEFI)?

Unified Extensible Firmware Interface (UEFI) is a specification for a software program that connects a computer's firmware to its operating system (OS). UEFI is expected to eventually replace basic input/output system (BIOS) but is compatible with it. The specification is most often pronounced by naming the letters U-E-F-I.


what is secure boot ?

Secure Boot is one feature of the latest Unified Extensible Firmware Interface (UEFI) 2.3. 1 specification (Errata C). The feature defines an entirely new interface between operating system and firmware/BIOS. When enabled and fully configured, Secure Boot helps a computer resist attacks and infection from malware.



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