Choose UEFI or Legacy BIOS when booting into Windows Setup or Windows PE Just before we start, you should know that this post is not about switching firmware modes.

Therefore to migrate from a legacy system using MBR and BIOS to a UEFI-supported operating system, the boot disk needs to be converted to GPT.

To understand the transition from legacy BIOS to UEFI firmware, it’s best to begin with a review of a decades-old system—the 1983 IBM-compatible PC—and continue with a study of its successor ...

I figured out that it's uses UEFI and secure boot was on and couldn't be disabled and hitting f12 to bring up the boot menu didn't work. So in the bios/uefi settings I changed it to the legacy ...

Intel is getting ready to kick legacy BIOS support to the curb, with future platforms taking full advantage of the UEFI Class 3, the most recent version of UEFI. That is already the case for many ...