Compared to BIOS, Unified Extensible Firmware Interface (UEFI) makes the figurer extra secure. If your laptop supports UEFI, you lot should purpose it. However, at times, the legacy BIOS is nonetheless useful. An illustration – if you’re booting from a network that solely supports BIOS, you’ll involve to kicking to legacy BIOS mode. The same tin hap for UEFI. In this guide, nosotros volition portion how to pick out UEFI or Legacy BIOS when booting into Windows Setup or Windows PE. For your information, Windows PE is used to install, deploy, as well as repair Windows 10 (all versions).
Choose UEFI or Legacy BIOS when booting into Windows Setup or Windows PE
Just earlier nosotros start, you lot should know that this postal service is non virtually switching firmware modes. If you lot are planning to deed from legacy BIOS to UEFI, you lot volition induce got to purpose MBR2GPT Tool. So if you lot are inward a province of affairs where you lot involve to purpose BIOS mode, but your PC is laid to UEFI, hither is what you lot involve to do. It is solely possible when you lot induce got difficult drives connected to the organization which has both BIOS: MBR crusade as well as UEFI: GPT drive.
Note: Some devices solely back upwards UEFI or Boot. While others volition inquire you lot to disable the UEFI safety features outset to kicking using BIOS.
1] Open Firmware Menu: To croak into UEFI or BIOS, press del or F12 or like hotkey to croak into it. Every OEM induce got their convention. Sometimes it could last using the Volume upwards or downward button. If this doesn’t work, you lot tin kicking into advanced recovery mode. Restart yesteryear belongings the shift key. It volition accept you lot to the recovery menu. Here navigate to-
Troubleshoot > Advanced Options > UEFI Firmware settings.
2] Look for the selection which says “Boot to Drive or Network.” Along alongside this, you lot volition induce got the chance to pick out betwixt UEFI or BIOS. Identify it. If you lot Boot into a network which doesn’t back upwards UEFI, you lot volition induce got to laid about over. The menus could expect like to the options equally below.
UEFI: USB Drive or BIOS: Network/LAN.
Both of these options purpose the same device as well as media but boots the PC inward a dissimilar firmware mode. In instance you lot involve to disable UEFI safety feature, navigate to Security > Secure Boot and disable the feature.
How to detect the firmware mode
When the installation starts, if the PC is booted to the incorrect mode, Windows installation volition fail. To create this, restart the PC. And pick out the correct firmware mode.
You tin purpose the command-
reg question HKLM\System\CurrentControlSet\Control /v PEFirmwareType
to detect out if you lot are inward BIOS or UEFI when using WindowsPE. If the provide is 0x1, it means BIOS, if its 0x2 its UEFI.
How to brand certain to ever Boot into the RIGHT mode
It is possible to gear upwards such that during the Windows Setup or when using Windows PE, the figurer solely boots into either UEFI or legacy BIOS. To croak this done, nosotros volition brand simply about changes to the Setup file. This way you lot volition non induce got to pick out UEFI or Legacy BIOS every time.
We know that when Windows boots, the kicking director looks for either a bootmgr or EFI folder. To brand certain that you lot kicking into correct mode, nosotros tin take the files that Windows PE or Windows Setup purpose to kicking into the firmware.
| Phase | BIOS | UEFI |
| Windows Boot Manager | %SystemDrive%\bootmgr | \EFI\Microsoft\Boot\bootmgfw.efi |
Boot solely inward UEFI mode
To kicking solely when inward UEFI mode, take the bootmgr file from the source of the Windows PE or Windows Setup media. This volition prevent the device from starting inward BIOS mode.
Boot solely inward BIOS mode
In this case, take the efi folder from the source of the Windows PE or Windows Setup media. This prevents the device from starting inward UEFI mode.
It is solely useful during setup of the machine, as well as non later that.
Source: https://www.thewindowsclub.com/
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