Windows 10: Choose UEFI or Legacy BIOS when booting into Windows Setup or Windows PE

Compared to BIOS, Unified Extensible Firmware Interface (UEFI) makes the computer extra secure. If your laptop supports UEFI, you should use it. However, at times, the legacy BIOS is still useful. An example – if you’re booting from a network [...]

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Windows Setup and UEFI BIOS

Suppose I have my Windows 7 Pro 64-bit ISO setup contents copied to a boot-able USB flash drive.
Suppose I modified it by copying the folder efi/microsoft/boot, and pasting it to efi/ to make my windows boot on UEFI systems. (as said on this tutorial, for 64-bit)

Question:
Would my UEFI-ied Windows 7 Setup work on other BIOS systems?

 

Unable to upgrade to Windows 10, Error message: A system image created using UEFI cannot be restored on a computer using legacy BIOS.

Hi,



UEFI BIOS supports two boot modes: Legacy BIOS boot mode and UEFI boot mode. Some devices and operating systems do not yet support UEFI-based BIOS and can boot only from Legacy BIOS boot mode. Choose Legacy BIOS boot mode to allow HBAs and Express
Module devices to use option ROMs. Choose UEFI boot mode to use UEFI drivers.



Only devices that support the selected boot mode are listed on the BIOS Boot screen. If you select UEFI Boot Mode, only boot candidates that support UEFI BIOS boot mode are listed on the BIOS Setup Utility screens in the Boot Options Priority list.
If you select Legacy BIOS boot mode, only boot candidates that support Legacy BIOS boot mode are listed in the Boot Options Priority list.



Please refer to the below article to Upgrade to Windows 10 using ISO File.

How to Upgrade to Windows 10 Anniversary Update version 1607 using ISO File



Hope you can upgrade to Windows 10.

Let us know if you need further assistance on upgrading to Windows 10, we will be glad to help you.

 

Trouble installing windows 7 on RAID in UEFI

As the title says, I'm trying to install Windows on a RAID array in uefi on my Maximus V Formula. When using legacy ROM I can install just fine but I go into CSM and change settings to UEFI only, I can build the array in the UEFI Raid driver (IRST tab in "BIOS") but the array does not show up in the boot menu and when I try to install windows (boot from UEFI DVD drive), The drive does not show up in the Windows install. The next thing I tried was to enable UEFI and legacy oprom in CSM, boot from UEFI DVD drive and install to the RAID array (probably detected by legacy oprom) and it will install. After first reboot, Windows Boot manager will show up as an option in the BIOS boot menu so I set that as first boot device and reboot. I will get to the starting windows screen and then BSOD (too quick to get codes) The last thing I tried was Changing to legacy mode and installing windows to a different drive. once installed, I initialized the Raid array as GPT and rebooted, changed csm back to UEFI only but they RAID array still doesn't show in the boot device list so I repeated the earlier process hoping that It might work because I had initialized as GPT but it still BSODs on starting windows screen. Any help or suggestions would be greatly appreciated