Target System Bios Or Uefi
Uefi is essentially a tiny operating system that runs on top of the pc s firmware and it can do a lot more than a bios.
Target system bios or uefi. Select uefi boot mode or legacy bios boot mode bios your system supports both uefi boot mode and legacy bios boot mode. A bios to uefi transformation unplug any external disk devices from your target system including usb flash drives. Check if you are using uefi or bios on windows on windows system information in start panel and under bios mode you can find the boot mode. On the other hand when dual uefi bios is enabled you will see mbr partition scheme for bios or uefi which means that it can boot both in bios mode and pure uefi mode.
Go to run win r type msinfo32 and press enter then under system summary the bios mode is shown. Go to disk management right click on disk 0 click on properties under volume table the partition style is shown. To know the type of disk of the target system perform these steps. If the iso file contains files larger than 4gb choose ntfs.
Note the operating system can only boot with the boot mode property value that was initially set at installation. By the way if a linux iso is dual uefi bios it will usually remain that way after creating a bootable usb in rufus and you don t need to enable dual uefi bios mode using alt e. If it says legacy your system has bios. In order to know the boot type follow the step.
If it says uefi well it s uefi. Press alt e.