Hello,

I have a pxe server with gpxelinux. It can boot iso's over the network. I use WinPE with Imagex to deploy windows. I boot an WinPE iso over http and then it starts to deploy. 

Some computers with Windows 8 have an uefi bios. The product key is stored in the bios. The problem is that Windows 8 only can get the key if it uses the gpt filesystem. To make the gpt partitions and the bcdedit settings, you must boot WinPE in uefi.

There's no option in gpxelinux to boot the iso in uefi. How can i solve this problem?

As I commented in your other thread, Windows 8's ability to read the product key from the BIOS has nothing to do with MBR or GPT deployments, but how the Windows image was created.

You can do a UEFI PXE boot using the WDS role in Server 2012.

• Marked as answer by Leo HuangMicrosoft contingent staff, Moderator Tuesday, May 14, 2013 8:55 AM

As I commented in your other thread, Windows 8's ability to read the product key from the BIOS has nothing to do with MBR or GPT deployments, but how the Windows image was created.

You can do a UEFI PXE boot using the WDS role in Server 2012.

• Marked as answer by Leo HuangMicrosoft contingent staff, Moderator Tuesday, May 14, 2013 8:55 AM

Hello, grub2 can do uefi boot from pxe.

Hi, I am investigating around to see how i can boot winpe from linux based pxe server in uefi mode. I saw several places including this one to use grub2 for this. Is there a instruction anywhere on the internet to implement this? I would appreciate it thanks., ! 

I have found this regarding Grub2 and iPXE:

http://reboot.pro/topic/19414-chainload-winpe-pxe-uefi/

A long time ago, I tried to do that too. But remember you need secure boot too, it means you need grub.signed from ubuntu. 

From my experience, booting from linux was very slow then I decided to switch to Server 2012 WDS and it was so easy to put a wim and have uefi network boot.

BUT I would like to know the solution too. I would like to boot ubuntu via uefi network ! 

Even leagacy was so easy editing bcd every time to add boot image. 

What do you need Secure Boot for? Is it requirement for your project? You can do UEFI boot with a system that does not support Secure Boot or with one where it is disabled.