Windows 8 and 8.1 Forums


Win 8.1 UEFI Installation from a bootable usb

  1. #1


    Posts : 68
    Windows 8 Pro 64-bit

    Win 8.1 UEFI Installation from a bootable usb


    I have a Dell Inspiron 7720

    I have created an uefi bootable usn flash disk with rufus 1.4b

    I'm trying to boot from it so i can create a Windows 8.1 uefi installation and the problem is that the usb flash disk wont boot.

    I have secure boot enabled and
    legacy option rom disabled.

    Am i doing something wrong?

      My System SpecsSystem Spec

  2. #2


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


    Are you booting the USB/DVD in UEFI mode?

    Click image for larger version
      My System SpecsSystem Spec

  3. #3


    Posts : 19
    Windows 8.1 Pro with Media Center 64-bit


    Quote Originally Posted by nikos View Post
    I have a Dell Inspiron 7720

    I have created an uefi bootable usn flash disk with rufus 1.4b

    I'm trying to boot from it so i can create a Windows 8.1 uefi installation and the problem is that the usb flash disk wont boot.

    I have secure boot enabled and
    legacy option rom disabled.

    Am i doing something wrong?
    I found a post on the dell community forums that might help.

    17R 7720 SE: Lost BIOS Access - Laptop General Hardware Forum - Laptop - Dell Community

    The post tells you how to go into the bios and add the boot option for your usb.
      My System SpecsSystem Spec

  4. #4


    Instructions for the Rufus installation:

    UEFI Bootable USB Flash Drive - Create in Windows
      My System SpecsSystem Spec

  5. #5


    Posts : 68
    Windows 8 Pro 64-bit


    Mr Sardonicus i have followed both methods but i just cannot see an entry for my usb.


    Why it is not present?

    When i try uefi instalaltion is it ok to have?

    secure boot: enable
    legacy option disbale?
      My System SpecsSystem Spec

  6. #6


    Have you tried the flash drive in the USB 2.0 port.
      My System SpecsSystem Spec

  7. #7


    Posts : 68
    Windows 8 Pro 64-bit


    I have 3 x usb3 ports with the label SS in the side. I see no usb2 port in my 7720. Is there any?

    And what the SS means?
      My System SpecsSystem Spec

  8. #8


    Posts : 68
    Windows 8 Pro 64-bit


    Quote Originally Posted by Sunnova View Post
    Quote Originally Posted by nikos View Post
    I have a Dell Inspiron 7720

    I have created an uefi bootable usn flash disk with rufus 1.4b

    I'm trying to boot from it so i can create a Windows 8.1 uefi installation and the problem is that the usb flash disk wont boot.

    I have secure boot enabled and
    legacy option rom disabled.

    Am i doing something wrong?
    I found a post on the dell community forums that might help.

    17R 7720 SE: Lost BIOS Access - Laptop General Hardware Forum - Laptop - Dell Community

    The post tells you how to go into the bios and add the boot option for your usb.
    Why si there a need to add my usb flash boot as an option?

    Shouldnt it detect ti automatically as a device?
    when i enable "load legecy rom" i can see it in the list, but i dont at boot time if i press F12.
      My System SpecsSystem Spec

Win 8.1 UEFI Installation from a bootable usb
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