Windows 8 and 8.1 Forums


UEFI Bootable USB Flash Drive - Create in Windows

  1. #470


    Posts : 3
    win 7 sp1 ultimate x64




    Click image for larger version

    I found a guide similar to this one Installing Windows 7 in native EFI mode from USB - bit-tech.net Forums

    Problem is that I made "install.wim" file inside the ISO which is greater than 4Gb and fat32's file size limit is surpassed ( the reason is because I've collected all updates from windows updates downloader ).

    Because I could not get it to work I made a DVDR and installed a second windows 7 SP1 x64 with most of the update, and it worked (although not flawlessly).

    I believe I already tried the trick found in step 11 with a USB formatted to NTFS and although I could select a GPT partition to install windows 7 sp1 x64 from a UEFI bios there was another error at which point I gave up and went to make a DVDR media.

    There is obviously an install size limitation with DVDRW 4.37Gb and DVDR 4.7Gb but one of the advantages of USB is that they are usually nowadays at least 8Gb, but using the fat32 install method throws a spanner in the works.

    Are there any workarounds possible. Perhaps making 2 "install.wim" files or adding updates to the "boot.wim"? Or is it possible to use NTFS?

    This is where I found a guide to using NTLite to update windows 7 (don't forget windows updates downloader):
    [Guide] Integration of drivers into a Win7/8/10 image
    Last edited by sgtsixpack; 04 Apr 2015 at 07:55.

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  2. #471


    .ie
    Posts : 35
    Windows 7 x64


    Quote Originally Posted by sgtsixpack View Post
    Are there any workarounds possible. Perhaps making 2 .wim files or adding updates to the .boot? Or is it possible to use NTFS?
    Why are you using Rufus 1.3.2? This is a VERY OLD version, and if you had used the latest (version 2.1 - it might help to check Rufus' official site once in a while!), you would have found that the latest version will happily let you create an UEFI bootable NTFS drive, as long as you set the target to GPT for UEFI after selecting your ISO. No need to split or anything.

    Can you please try Rufus 2.1. Oh and if Rufus asks you if you want to allow it to check for application updates, please enable that.

    EDIT: my bad, was looking at the right part of the screen, but I see that you are using latest. Then you should be able to select NTFS. Do you get an error when selecting NTFS instead of FAT32?
      My System SpecsSystem Spec

  3. #472


    Posts : 3
    win 7 sp1 ultimate x64


    As in the screenshots I am using rufus 2.1. I honestly can't remember what I've tried but one thing I know that with the USB installer I created - none of the options in my bios helped to get it past the choose partition stage.

    The main point of my post was to point out the limitation of using fat32 as a basis for the install. I'm sure that the guide will work flawlessly if I didn't exceed 4Gb size for the install.wim file.
      My System SpecsSystem Spec

  4. #473


    .ie
    Posts : 35
    Windows 7 x64


    Yeah. Until very recently FAT32 was the only option, so that's why the guide still points to using FAT32.

    It's only with version 2.0 that Rufus added the ability to create UEFI bootable NTFS drives. However, this requires executing extra code at boot and loading an NTFS drive, which, even as it is done transparently by Rufus, leaves the possibility that some UEFI firmwares may not like it. So the recommended process is to prefer FAT32 if you don't have a large file, and use NTFS only if you have a >4GB file.

    Anyway, please let us know if you are able to boot with GPT for UEFI and NTFS as the file system. If you are using Rufus 2.1, this should work.
      My System SpecsSystem Spec

  5. #474


    Posts : 2,634
    Windows 3.1 > Windows 10


    Some Firmware allows Booting UEFI from NTFS Media - not all.. Mine Does..
      My System SpecsSystem Spec

  6. #475


    Posts : 3
    win 7 sp1 ultimate x64


    Quote Originally Posted by KYHI View Post
    Some Firmware allows Booting UEFI from NTFS Media - not all.. Mine Does..
    You're right. In my firmware F5 for Gigabyte Z97X Gaming 5 it lists 2 separate boot options if your flash stick has fat32 file system & "GPT scheme for UEFI computer" normal and UEFI:media_name, and no UEFI options if NTFS formated with "GPT scheme for UEFI computer". That is with CSM option enabled (compatibility support module), without only UEFI options are listed. So that's why I agree its a firmware limitation.

    If I chose MBR for UEFI/ MBR for BIOS or UEFI computers, I'd have to test (only tested without changing firmware options) if I could install windows 7 to a GPT formated disk in UEFI mode. I'm not sure if the Rufus options refer to the formating of the USB flash drive or the target disk.

    I made an image which contains all the updates and a few options within size limits. Installed on GPT disk with UEFI firmware using a Fat32 formatted USB flash drive. It takes 1:30 to write the image. Took a while to make the image in NTLite, and took along time on "windows finalising settings" cause I'm using an old 200Gb Samsung spinpoint to test. I'll need to format my SSD to GPT to do a dual boot without entering the bios. 4Tb has to use GPT.
      My System SpecsSystem Spec

  7. #476


    Posts : 24
    8.1 pro + Ubuntu


    @Akeo... I pre-format my 32GB thumb drive to FAT32 and then try to create an installer using your latest Rufus. It reports to me that it cannot use FAT32 with 'this type of ISO'.... referring to the Windows 10 TP ISO's....?

    MS themselves suggest that the thumb drive should be FAT32 for Win 10 installer..... something doesn't add up.
      My System SpecsSystem Spec

  8. #477


    .ie
    Posts : 35
    Windows 7 x64


    Quote Originally Posted by base1268 View Post
    @Akeo... I pre-format my 32GB thumb drive to FAT32 and then try to create an installer using your latest Rufus. It reports to me that it cannot use FAT32 with 'this type of ISO'.... referring to the Windows 10 TP ISO's....?

    MS themselves suggest that the thumb drive should be FAT32 for Win 10 installer..... something doesn't add up.
    1. Select the ISO in Rufus
    2. Set the Partition Scheme and Target System type to GPT for UEFI computer. You must change that option, as the default of Rufus is to use MBR (in which case this will only be bootable in CSM mode on UEFI systems and Rufus will indeed use NTFS)
    3. Select the filesystem you want. Rufus should have picked FAT32 by default (after you changed Partition Scheme to GPT), but you should be able to switch to NTFS if you want, or if you have a >4GB file.

    You should not preformat the drive before using Rufus - Rufus will format it for you according to the filesystem you selected.

    @sgtsixpack,

    1. If you select the right options (see above), you should be able to boot an NTFS drive created by Rufus using UEFI. Rufus allows NTFS UEFI boot regardless of your UEFI firmware. But you must make sure you select GPT and NTFS after selecting your ISO (ISO selection should always be the first step when using Rufus).
    2. The Rufus options apply only to the USB drive. The Windows installer decides the rest. However, it's easier to force the installer to use UEFI installation mode if you boot through UEFI in Rufus, in which case you really want to use GPT, as this will ensure you cannot boot in CSM mode.
      My System SpecsSystem Spec

  9. #478


    Hey guys,

    I've followed this guide and its gotten me to the point where I can start the win 7 x64 installation, but I am prompted to load drivers, as it is a USB i think the windows installer is having a bit of a freak out??

    It is loading UEFI and goes throw the language screen fine and then prompts to load driver/s. Selecting any location on the flash drive does nothing, and neither does selecting any other drive options (C:, D:, or X:,).

    Any assistance is appreciated!

    Click image for larger version
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  10. #479


    Posts : 22,022
    64-bit Windows 10


    Hello TheSnottyMidget, and welcome to Eight Forums.

    This may be able to help.

    SATA Driver - Load in Windows 7 or Vista Setup - Windows 7 Help Forums
      My System SpecsSystem Spec

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UEFI Bootable USB Flash Drive - Create in Windows

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