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BIOS + UEFI Bootable Flash Drive

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mightymo77    1

Is it possible to have a single bootable flash drive, with a Windows 10 installation that can boot both BIOS and UEFI. Perhaps a menu that appears first or something?

Edited by mightymo77

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Matthew S.    1,031

by default the media creation tool does just that, there is no way for there to be a "boot menu" to choose between the two as both are enabled in different ways, UEFI looks for an EFI boot partition or in the case of removable media it looks for either a /boot/EFI folder or /EFI. BIOS booting looks for a bootable MBR.

 

https://wiki.manjaro.org/index.php?title=Some_basics_of_MBR_v/s_GPT_and_BIOS_v/s_UEFI

https://en.wikipedia.org/wiki/Unified_Extensible_Firmware_Interface

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Matthew S.    1,031

Also forgot to mention, for x86_32 and x86_64 bit systems MBR bootloaders are typically two or even three stages, first stage sets up all the 16bit stuff then hands off to 32bit and if running a 64bit OS 32bit hands off to 64bit.

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