Windows 10: How to install an UEFI-based ISO (bootable with DVD) on an USB flash?

I have an UEFI-based ISO file for a tool on windows (This tool is NOT a WinOS but a separate utility tool).
If I burn this ISO onto a DVD and boot it on an UEFI computer (without Secure Boot) everything works.

However If I put this ISO with e.g. Rufus onto an USB flash drive then the USB flash drive does not boot and show an error message:

"Could not locate 'EFI\boot\bootx64.efi': Not found

Yes, the file and the directory is missing.

After a long search I found a hint:
Surprisingly a DVD-bootable ISO is NOT automatically bootable from USB flash drive due to different handling of Bootmanager.

Interesting. I have not expected that.

Now my problem is:

Can I convert this only-on-DVD-bootable ISO to a bootable-from-USB-flash-drive ISO?

Alternatively it would be acceptable to create at first an UEFI-bootable USB flash drive and extract (which?) tool files out of the ISO onto this USB flash drive. I guess I have to declare (where?) what program should be started during USB flash drive boot.

Any suggestions?

E.g.Ventoy does not help.

It must be a solution which prepares the USB flash drive for simple UEFI boot and let me add (before or afterwards) an additional tool.

Peter

:)

 

How To Burn Win10 ISO as UEFI?

A DVD burned from the ISO file is UEFI compatible - it will both boot in UEFI mode and capable of installing Windows 10 in UEFI mode. No bootable USB flash drive is required.

 

Install Windows 10 using UEFI bootable USB thumb drive

You need to go into you system bios and select allow uefi usb drive. Then add the UEFI usb drive to the boot menu

better way to partition aand create an bootable usb.

For the UEFI system, we can use these steps to create the bootable USB:

1.Locate a 4GB or larger USB flash drive

2.Open Diskpart and run the following command cmd admin type diskpart

• Type DiskPart in the command prompt.
• Type "List Disk” (make note of the disk number of the target USB drive).
• Type "Select Disk X”, where X is the target USB drive noted in step 4.
• Type "Clean”.
• Type "Create Partition Primary”.
• Type "format FS=fat32 quick”.
• Type "Active”.
• Type "Assign".
• Type "Exit".

Copy your ISO files to the drive and reboot

never use UEFI it better to repartition and remove UEFI go with legacy bois

 

Bootable USB with ISO - What am I missing?

Tried the first program, but it fails .. not sure yet why but troubleshooting that ...

The pendrive seems to be only for linux? although seems very useful i dont think it will help me with this. Keeping it for future linux installs though

hmmm if I already have the iso, do I just throw that in the usb drive?

ok looking into this as well...