topgundcp said: View Post
I don't understand why people think that the USB must be formatted with FAT32, This restriction is only applied to the UEFI Firmware prior to version 2.0.
My PC is 5 year old MSI-Z77 and all bootable are formatted with NTFS. The only restriction is: All disks/USB must be MBR disk type to support both UEFI and MBR. See screen shot:
  1. PE_BAKE (customized version of PE similar to KYHI's) set as Active for both MBR and UEFI boot (Disk 2).
  2. Win10 Installation UEFI only since only one partition can be set Active on the same internal disk (Disk 2). To be able to boot with MBR, set this partition Active.
  3. Macrium Rescue is on internal disk (Disk 3) Set Active for both MBR and UEFI boot.
  4. Another version of Windows 10 Installation on a Removable Sandisk. Formatted with NTFS since the Install. wim is 4.7GB, slip stream with the latest update of Version 17133.73

NOTE: If the USB does not boot, might need to run from admin command: bootsect /nt60 X: where X: is the drive letter of the USB
NOTE 1: When ever a new version is available, just use 7-ZIP, set it to override to unzip all the files from ISO. No need to use Rufus , No need to re-format.

Attachment 185088
It really does vary from device to device. My laptop will not boot from an ntfs formatted pc and it is about 4 years old. Fat32 is guaranteed to work on all pcs.

This document from MS last year is quite categoric about the EFI partition being fat32.

I accept that may not apply to winpe but nonetheless.

UEFI/GPT-based hard drive partitions | Microsoft Docs