Options to create a bootable Windows 10 iso with GPT partion

In November 2019 A bootable Windows 10 iso was created on a computer with UEFI/GPT.

The bootable Windows 10 iso couldn't be used to perform a custom install as the computer displayed:

Windows cannot be installed on this disk.
The selected disk is of the GPT partition style.

Diskpart lis dis displayed MBR partition with FAT32.




Are all of these workable options?

a) conversion MBR to GPT on the flash drive without data loss
b) conversion MBR to GPT on the flash drive with data loss
c) command line to create GPT with FAT32 followed by copy and paste from a desktop iso
d) Rufus or other third party software
e) disk management
f) other options?


The computer has MiniTool Partition Wizard Pro 11.5
Convert MBR to GPT without data loss with a free Partition Magic

What would be the command line commands?

diskpart
list dis (determine the disk # for the flash drive)
select disk W (replace W with the drive # for the flash drive)
clean
convert GPT
create partition primary
format fs=FAT32 or (format fs=FAT32 quick?)
assign
exit

What would happen if each assign and/or active and/or quick are used or not used?

https://docs.microsoft.com/en-us/win...ommands/active
https://docs.microsoft.com/en-us/win...ommands/assign
https://docs.microsoft.com/en-us/win...tition-primary
Convert MBR Disk to GPT Disk in Windows 10



Would copy and paste of a desktop windows 10 iso to the flash drive then make it work as a bootable windows 10 iso GPT/FAT32?

Code:

Microsoft Windows [Version 10.0.17763.973]
(c) 2018 Microsoft Corporation. All rights reserved.

C:\WINDOWS\system32>diskpart

Microsoft DiskPart version 10.0.17763.1

Copyright (C) Microsoft Corporation.
On computer: DESKTOP-9HEBUKS

DISKPART> lis dis

  Disk ###  Status         Size     Free     Dyn  Gpt
  --------  -------------  -------  -------  ---  ---
  Disk 0    Online          238 GB  1024 KB        *
  Disk 1    Online           58 GB    26 GB

DISKPART> sel dis 1

Disk 1 is now the selected disk.

DISKPART> det dis

SanDisk Cruzer Glide USB Device
Disk ID: 2E2B553C
Type   : USB
Status : Online
Path   : 0
Target : 0
LUN ID : 0
Location Path : UNAVAILABLE
Current Read-only State : No
Read-only  : No
Boot Disk  : No
Pagefile Disk  : No
Hibernation File Disk  : No
Crashdump Disk  : No
Clustered Disk  : No

  Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
  ----------  ---  -----------  -----  ----------  -------  ---------  --------
  Volume 4     E   ESD-USB      FAT32  Removable     32 GB  Healthy

DISKPART> lis par

  Partition ###  Type              Size     Offset
  -------------  ----------------  -------  -------
  Partition 1    Primary             32 GB  1024 KB

DISKPART> sel par 1

Partition 1 is now the selected partition.

DISKPART> det par

Partition 1
Type  : 0C
Hidden: No
Active: Yes
Offset in Bytes: 1048576

  Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
  ----------  ---  -----------  -----  ----------  -------  ---------  --------
* Volume 4     E   ESD-USB      FAT32  Removable     32 GB  Healthy

DISKPART> lis vol

  Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
  ----------  ---  -----------  -----  ----------  -------  ---------  --------
  Volume 0         Recovery     NTFS   Partition    450 MB  Healthy
  Volume 1     C                NTFS   Partition    237 GB  Healthy    Boot
  Volume 2                      NTFS   Partition    885 MB  Healthy
  Volume 3                      FAT32  Partition    100 MB  Healthy    System
  Volume 4     E   ESD-USB      FAT32  Removable     32 GB  Healthy


DISKPART>

The problematic computer is UEFI /GPT and the iso is MBR.
Sorry for any confusion.
The computer used to run the diskpart command was not the problematic computer and it was to display the flash drive information.

This was msinfo32 displaying UEFI

Code:

OS Name	Microsoft Windows 10 Pro
Version	10.0.16299 Build 16299
Other OS Description 	Not Available
OS Manufacturer	Microsoft Corporation
System Name	DESKTOP-BH9NBPV
System Manufacturer	Hewlett-Packard
System Model	HP ZBook 17
System Type	x64-based PC
System SKU	D5D93AV#ABA
Processor	Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz, 2694 Mhz, 4 Core(s), 8 Logical Processor(s)
BIOS Version/Date	Hewlett-Packard L70 Ver. 01.46, 8/29/2019
SMBIOS Version	2.7
Embedded Controller Version	148.86
BIOS Mode	UEFI
BaseBoard Manufacturer	Hewlett-Packard
BaseBoard Model	Not Available
BaseBoard Name	Base Board
Platform Role	Mobile
Secure Boot State	Off
PCR7 Configuration	Binding Not Possible
Windows Directory	C:\WINDOWS
System Directory	C:\WINDOWS\system32
Boot Device	\Device\HarddiskVolume2
Locale	United States
Hardware Abstraction Layer	Version = "10.0.16299.15"
User Name	DESKTOP-BH9NBPV\aaaaaaa
Time Zone	Central Standard Time
Installed Physical Memory (RAM)	16.0 GB
Total Physical Memory	15.4 GB
Available Physical Memory	13.9 GB
Total Virtual Memory	17.8 GB
Available Virtual Memory	16.5 GB
Page File Space	2.38 GB
Page File	C:\pagefile.sys
Virtualization-based security	Not enabled
Device Encryption Support	Reasons for failed automatic device encryption: PCR7 binding is not supported, Hardware Security Test Interface failed and device is not InstantGo, Un-allowed DMA capable bus/device(s) detected
Hyper-V - VM Monitor Mode Extensions	Yes
Hyper-V - Second Level Address Translation Extensions	Yes
Hyper-V - Virtualization Enabled in Firmware	No
Hyper-V - Data Execution Protection	Yes

It's working on updates with "Don't turn your computer off".
When it completes I'll check the BIOS settings.




The boot mode is: UEFI Hybrid (with CSM)


The Windows 10 iso was made by the Microsoft website:
https://www.microsoft.com/en-us/soft...load/windows10

It's in MBR / FAT32

It has a mismatch MBR to GPT preventing the custom install:
Custom Install Windows 10

Can the flash drive be converted from MBR to GPT to allow the custom install?

zbook said:

The boot mode is: UEFI Hybrid (with CSM)


The Windows 10 iso was made by the Microsoft website:
https://www.microsoft.com/en-us/soft...load/windows10

It's in MBR / FAT32

It has a mismatch MBR to GPT preventing the custom install:
Custom Install Windows 10

Can the flash drive be converted from MBR to GPT to allow the custom install?

As has been stated multiple times, and now again, the USB flash drive being MBR has NOTHING to do with your problem! The problem is that you have CSM mode enabled and you are booting the flash drive in CSM (legacy BIOS) mode. Boot the flash drive in UEFI mode and your problem will be solved.

The boot mode was changed from UEFI hybrid to UEFI native.

Booting to the iso now.

The boot mode was changed from UEFI hybrid to UEFI native.

Booting to the iso now.


That fixed the mismatch!


Thank you



Would the conversion of the flash drive to GPT fail to create a bootable Windows 10 iso GPT / FAT32?
If it did work would it have been able to perform a custom install while in UEFI hybrid?

megahertz said:

just to clarify for those who see this thread
- windows (7, 8.x or 10) can be installed as legacy - mbr or efi - gpt (64 bits only)
- to install as efi - gpt, "bios" must be efi mode.
- to install as legacy - mbr, "bios" must be legacy or efi csm mode.
- to install as legacy - mbr, the installation drive must be booted as legacy (legacy or efi csm bios)
- to install as efi - gpt, the installation drive must be booted as efi (on efi bios)
- to boot as efi, a usb installation drive to must be formatted as fat32, not ntfs

- if you boot the installation drive as efi and your target drive is mbr you must first delete all partitions to be able to create a gpt drive and then install as efi - gpt.
- if you boot the installation drive as legacy and your target drive is gpt you must first delete all partitions to be able to create a mbr drive and then install as legacy - mbr.

lucid