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The section assumes you are installing GRUB for 圆4 (64-bit) UEFI.A /EFI examples article has been provided for such cases. The procedure described below is intended to work on a wide range of UEFI systems but those experiencing problems despite applying this method are encouraged to share detailed information, and if possible the workarounds found, for their hardware-specific case. UEFI firmwares are not implemented consistently across manufacturers.If you want to use any additional GRUB module that is not included in the standard GRUB EFI file grub圆4.efi on a Secure Boot system, you have to re-generate the GRUB EFI grub圆4.efi with grub-mkstandalone with the additional GRUB modules included. As discussed in Unified Extensible Firmware Interface/Secure Boot#shim with key and GRUB, this is not the case on UEFI systems with Secure Boot enabled. This whole article assumes that inserting additional GRUB2 modules via insmod is possible.Follow EFI system partition#Check for an existing partition to find out if you have one already, otherwise you need to create it. To boot from a disk using UEFI, an EFI system partition is required.Installing to the fallback boot path will still work even in BIOS mode since it does not touch the NVRAM. When installing to use UEFI it is important to boot the installation media in UEFI mode, otherwise efibootmgr will not be able to add the GRUB UEFI boot entry.

It is recommended to read and understand the Unified Extensible Firmware Interface, Partitioning#GUID Partition Table and Arch boot process#Under UEFI pages.

Microsoft windows 7 usb dvd download tool invalid iso file