Enable Legacy Boot From USB WIth ISO image Dell - Inspiron 3880 Desktop

Question

Hello,

I am trying to install Proxmox on my Inspirion desktop and it REQUIRES legacy boot. I have disabled secure boot and all that is available is UEFI. Is there a way to still boot the ISO image from my USB in legacy or did Dell remove it completely?

DELL-Cares · Answer

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Rerun-Vanpelt · Answer

I have the same issue. Did you receive a resolution for this?

speedstep · Answer

Dell didn't remove legacy INTEL/Microsoft did.

Class 3 BIOS has NO CSM and No Legacy boot. Intel calls the "UEFI Last Mile," to remove old legacy code from its products and focus on newer technologies like UEFI. This primarily means dropping BIOS in all PC's past 6th Gen Skylake. AMD and other vendors followed this so its 64 bit only, windows 10 only or higher, and UEFI GPT only. No legacy CSM or MBR.

Brian_Richardson_Intel_Class 3 UEFI

CLASS 3 UEFI.png class 2.3.1.jpg

EchoesofDreams · Answer

Is there any workaround for this?

EchoesofDreams · Answer

No, I am wondering if I can install an older version of the BIOS. It is super annoying, Dell wasn't thinking here.  Edit: Thank you SpeedStep for educating me on the subject. I was wrong.