Windows 8 and 8.1 Forums


UEFI Bootable USB Flash Drive - Create in Windows

  1. #160


    Posts : 6
    Windows 7 home premium/Windows 8 (sometimes)


    The problem is that the uefi bootable usb does not boot. I can boot from the usb in legacy mode and delete any partitions on the drive, but when I click next I get what is displayed in the disk management image from before. It will not let me select new. When I try I get an error message that says something about not being able to partition...I would have to try again to get the exact message. I will try disconnecting the other drive, but I do not see how that would make the usb all of the sudden start booting.

    I have used your tutorial to install windows 8 in uefi mode so I am familiar with the process. The problem is somewhere in the windows 7 usb.

      My System SpecsSystem Spec

  2. #161


    Posts : 6
    Windows 7 home premium/Windows 8 (sometimes)


    I disabled fastboot and unplugged the other hdd and now the computer will boot to the usb. I am not sure if it was the fastboot option or the drive...I wish I had tried one at a time to be sure. Now when I open disk management I see two partitions on the main drive. One is an (EFI system partition), the other is NTFS (boot, page file, crash dump, primary partition)...There were three partitions after selecting new from the drive setup menu. I checked msinfo32 and it does not say that my bios is uefi, but I am pretty sure that it worked (correct me if I am wrong). I did not re-make the usb drive, so that was not the problem. When I finish with the initial set up I will go back and see if I can tell which change made the difference.
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  3. #162


    Posts : 22,279
    64-bit Windows 10


    Wikedeye,

    It was disabling the fastboot option in UEFI settings that allowed you to be able to boot from the USB afterwards. If it's enabled, it prevents booting from USB flash drives.
      My System SpecsSystem Spec

  4. #163


    Posts : 6
    Windows 7 home premium/Windows 8 (sometimes)


    Probably, but I enabled it after installing the os and it boots from the usb still. I also tried plugging the other hdd in and it booted from usb. I then plugged in the hdd and enabled fastboot and it still boots from the usb. I am a bit confused now since I can not recreate the problem. However the problem seems to be solved.
      My System SpecsSystem Spec

  5. #164


    Posts : 22,279
    64-bit Windows 10


    Odd, but glad you got it sorted.
      My System SpecsSystem Spec

  6. #165


    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1


    Hi Wikedeye,

    You are welcome, well done.
      My System SpecsSystem Spec

  7. #166


    Posts : 11
    Windows 8.1 Pro


    I am getting a Dell XPS 8500 in a few days and it will have the UEFI. I do a clean install immediately when I get a new machine with all the preinstalled crap. I already had a USB Win 8 Pro Install already made up. I read the post here about making a UEFI one and followed the guide and it boots up and all but when I select the device to boot from it doesn't say UEFI beside the Thumb drive like the article said it would. Based on what I made from that tutorial it appears to be the same as I make with the .iso I have and using the Microsoft program that makes you the bootable USB. So is there any difference in the 2? Also when I wipe this new machine and I have this UEFI Win 8 install USB do I leave Bios alone with UEFI enabled? Thanks
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  8. #167


    Posts : 22,279
    64-bit Windows 10


    Hello uffbros,

    Before wiping the new Dell PC, I would strongly recommend creating a factory image first in case you may ever wish to restore it. Without it, you will have no way to restore your PC back to factory conditions once you do a clean install.
    Before you start installation, you'll need to use the "Clean" command to wipe the drive, then convert it to MBR from GPT.


    Afterwards, you'll have a blank slate to install Windows 8 with UEFI enabled as per the tutorial below.


    Hope this helps,
    Shawn
      My System SpecsSystem Spec

  9. #168


    Posts : 11
    Windows 8.1 Pro


    I have my own Windows 8 .iso's so I'm ok there. Can't I just boot up with my newly created USB flash drive with UEFI and delete them partitions instead of the way you just guided to?
      My System SpecsSystem Spec

  10. #169


    Posts : 22,279
    64-bit Windows 10


    Unfortunately no since the it's currently a GPT disk. It must be converted back to MBR first, then installed as per the last tutorial listed.
      My System SpecsSystem Spec

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UEFI Bootable USB Flash Drive - Create in Windows
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