In the BIOS Setup Utility, change the boot mode from UEFI mode to legacy BIOS mode (or CSM boot mode), and disable the Secure Boot option.
DISABLE SECURE BOOT WINDOWS 10 TOSHIBA HOW TO
If you don’t know how to access your BIOS (UEFI) Setup, please check out this article: How to Set Your Computer to Boot from CD or USB Drive. DELETE key, F8 key, F2 key) to enter BIOS Setup Utility. When your computer is powered on, check the boot-screen for setup key (i.e. How to Set Windows 10 / 8 PC to Boot with Legacy BIOS Mode Instead of UEFI Mode? The UEFI BIOS is created for Windows 10/8 and if you need to use other system like Windows 7, Linux or any other OS, you have to disable the UEFI mode and Secure Boot options. One of Microsoft’s new rules for Windows 10/8 is that any manufacturer that ships a windows 10/8 computer must enable UEFI secure boot by default. Fortunately, nearly all modern EFI-based computers include a feature known as the Compatibility Support Module (CSM) that enables them to boot with legacy BIOS mode. In order to fix this issue, all you need to do is to disable the UEFI mode and turn off the Secure Boot option in BIOS, which allows the EFI-based PC to operate in a legacy BIOS mode. Just got a new DELL laptop with Windows 8 pre-installed but it refused to boot from Ubuntu Live CD or even Windows 7 installation DVD? If you’re in similar situation, you should see the error message “ Reboot and Select proper Boot device” or “ No bootable device found” on the screen during boot.