[ANSWERED] Windows 8.1 Customized DVD not start in EFI mode

that not is issue with mainboard.
If you after of created an Windows 8.1 ISO using Winreducer not start in UEFI mode in BIOS.
If using an original Windows 8.1 DVD the mainboard start installation in UEFI mode without issues.
For me not is problem in Winreducer, but something in ISO or DVD burner software.
All EFI files in correct folders without lacking any files or wrongs files or folders names.
For "fix" i start using original DVD and after in Windows 8 Start Install screen i change using Winreducer DVD and not install problems =)
Any help ?
thanks.

You have to search first before posting man....


Look under Tutorials on main forum.

Man even using rufus not is possible boot in UEFI mode.
Burning DVD not fix. Even using correct names and files not boot in UEFI

Did you removed "Drivers - EFI and UEFI" ?

thanks for reply.
Not was removed Drivers EFI and UEFI.
All folders and corrects files names in Windows ISO Folder.
Perhaps is anything related with ISO file system creation ?
BIOS not find the correct UEFI files for start.

Ok, then you could read this thread : LINK (as branhama told you) or use the search function there are some discussion about this ...

Hi winter.
I think you are misunderstanding his problem.
He is able to install on his UEFI motherboard with an untouched disk, but not with a disk reduced by WinReducer.
So he uses the same process both times, but it doesnt work with the reduced disk.

He also said if he starts the installation with an untouched iso, and then replaces the untouched ISO disk with the reduced disk the installation completes without issue.

So, to me, it seems there is an issue with Winreducer.

Would it be fair to say the issue is most likely located in the boot.wim? Since he can get to the install screen with the untouched iso, but cannot with the reduced iso.

Yes, that's right theKramer, it seems I've misunderstood ... My bad ... But thank you my friend !  

OK, so Augusto, I need to know if you are using "Optimizations - ISO - Boot - Clean Boot Wim" ...

Not was removed Drivers EFI and UEFI.
Yes using original DVD is possible install in UEFI, but not with Winreducer ISO.
Yes if starts using original DVD and then of first install screen replace with Winreducer DVD the installation completes without issue in UEFI mode.

Optimizations - ISO - Boot - Clean Boot Wim is enabled.
For startup BIOS perhaps not read files on boot win.
All folders and files of UEFI files are correct.
Perhaps is anything when creating file system of ISO.
thanks.

Augusto wrote:

Not was removed Drivers EFI and UEFI.
Yes using original DVD is possible install in UEFI, but not with Winreducer ISO.
Yes if starts using original DVD and then of first install screen replace with Winreducer DVD the installation completes without issue in UEFI mode.

Optimizations - ISO - Boot - Clean Boot Wim is enabled.
For startup BIOS perhaps not read files on boot win.
All folders and files of UEFI files are correct.
Perhaps is anything when creating file system of ISO.
thanks.

Hi Augusto.
Can you make another ISO with "Optimizations - ISO - Boot - Clean Boot Wim" NOT enabled.

Since there is an issue with the booting to the install screen, we need to find out where the issue is.
This is a good place to start  
Thanks

Yes friend. I have created and tested an Winreducer ISO not enabling Clean Boot Win and another ISO not selecting all others Optimizations options and both not boot in UEFI.
That perhaps is anything with file system ... UEFI files to be writting in begin of ISO DVD media ?
thanks.

Hello,

Maybe you need to try something else, as installation media like an USB "key".

You could read some threads talking about your problem by using the search box in the forum, and use "UEFI" as keyword. You will find a tutorial to help you ...   

Please try this, and let us know.  

I have customized some Winreducer ISOs not selecting ISO Clean Boot files.
Even using USB pen drives with some USB boot utilities EFI not work.
Is more being anything related with ISO File System with the position of EFI boot file when writing DVD media.
Hmmm I will burning an ISO without customize installation just using Winreducer for create an ISO.
After I post here the result.
Thanks.