Windows ISO

https://pureinfotech.com/create-bootable-windows-11-usb-install-media/

Use Command Prompt to create a bootable USB to install Windows 11.

Caution: diskpart clean deletes everything on the selected disk. Run Command Prompt as Administrator. The select disk 1 value is an example — replace 1 with the flash drive's number from list disk.

Download the ISO

1. Open Microsoft Support website.
2. Under the "Download Windows 11 Disk Image (ISO)" section, select the Windows 11 option.
3. Click the Download button.
4. Select the installation language.
5. Click the Confirm button.
6. Click the Download button to save the Windows 11 ISO file on the device.

Prepare the USB

Open Start. Search for Command Prompt, right-click the top result, and select Run as Administrator.

Open Diskpart:

diskpart

Determine the USB flash drive:

list disk

Select the storage (1 is an example):

select disk 1

Delete everything from the USB flash drive:

clean

Create a primary partition:

create partition primary

Select the new partition:

select partition 1

Make the USB flash drive bootable:

format FS=FAT32 quick

Assign a volume and a drive letter (X is any available letter):

assign letter=X

Quit Diskpart:

exit

Mount the ISO and copy files

Mount the Windows 11 ISO (update the path):

PowerShell Mount-DiskImage -ImagePath "C:\path\to\Windows11.iso"

Launch Diskpart again:

diskpart

Determine the drive letter for the mounted Windows 11 ISO file:

list volume

Exit Diskpart:

exit

Access the Windows 11 ISO file (E: is an example):

E:

Enter the boot folder:

cd boot

Update the volume boot code for the USB flash drive:

bootsect /nt60 X:

Copy all the Windows 11 installation files to the USB flash drive. Change E and X to the ISO and USB letters:

xcopy E:\*.* X:\ /E /F /H

After these steps, the bootable flash drive can install Windows 11 on devices using UEFI.