Windows 8 and 8.1 Forums

Can't boot on USB Key

  1. #1


    Posts : 2
    Windows 7

    Can't boot on USB Key


    Hello everyone,

    I want to boot an iso image via my USB key, but when I plug the usb key, the boot blocks, when i remove it, it continue running... I have a Lennvo, in the bios:
    I tried to change boot mode from UEFI to Legacy: Nok
    No secure boot option in
    No fast boot option
    Enable/disable usb boot does nothing
    It's like if the usb port isn't recognized by the bios !

    Can ou help me please ?

      My System SpecsSystem Spec

  2. #2


    Harrisonburg, Va.
    Posts : 10,488
    Windows 8.1.1 Pro with Media Center


    Do you insert the usb & then restart or restart & then insert the usb ?
      My System SpecsSystem Spec

  3. #3


    Posts : 2
    Windows 7


    I start the laptop then insert the USB..
      My System SpecsSystem Spec

  4. #4


    Harrisonburg, Va.
    Posts : 10,488
    Windows 8.1.1 Pro with Media Center


    Quote Originally Posted by anas View Post
    I start the laptop then insert the USB..
    I think inserting the usb & then restarting would work better.
    If you have an F key to bring up the boot manager at restarting, press it to get the boot manager & select the usb to boot from.

    On my computer F-12 works.
    Press the F key as soon as restarting begins & hold it until the boot manager appears.
    This works for me.

    edit- You may have to go into the bios & enable the Boot Menu.

    Click image for larger version
      My System SpecsSystem Spec

  5. #5


    What is the ISO image for?
      My System SpecsSystem Spec

  6. #6


    Forever West
    Posts : 591
    WinVista, Win7, Win8.1, Win10, Mac OS X 10.10, Linux Mint 17.1


    The BIOS/Basic Input Output System stored on the motherboard determines the bootup process, has to look for certain files on a storage device to know what and how to start the computer. Once that is determined the OS/Operating System will load. For the OS to read a drive it has to load device drivers, however the BIOS will have support for USB 2.0 devices but drivers for USB 3.0 devices load with the OS. Drives such as USB Thumb/Flash or External HDDs need to be prepared with the necessary files that make them bootable so the BIOS can find and start them.
      My System SpecsSystem Spec

  7. #7


    Posts : 2,690
    Windows 3.1 > Windows 10


    I assume you copied the files contained within the ISO to USB stick and did not just copy the ISO file to USB ??
      My System SpecsSystem Spec

  8. #8


    Posts : 879
    Windows 10


    If you have a Lenovo laptop that came with Windows 8/8.1 preinstalled.

    How to install Windows 8/10 64-bit in UEFI Boot Mode.

    You do not need to change the UEFI firmware (BIOS) settings. For example, you do not need to change the boot order of drives, or disable Secure Boot, or enable Legacy BIOS (aka CSM) boot mode.

    - Connect your Windows 8/10 64-bit USB flash drive (Note: FAT32 file system) or insert your Windows 8/10 64-bit DVD.
    - Shut down your laptop.
    - Press the NOVO button (see screenshots below). The system loads boot options.
    - Select the BOOT MENU option.

    Click image for larger version

    Click image for larger version

    - Select your USB/DVD from the boot menu (see screenshots below).

    Click image for larger version

    Click image for larger version

    Here is more info:

    UEFI Boot Mode (installing using the GPT partition style) and Legacy BIOS Boot Mode (installing using the MBR partition style). -> link

    How to download and clean install Windows 8.1 if you have an OEM computer with UEFI firmware (BIOS) embedded Windows 8/8.1 product key. -> link
    Last edited by genet; 24 Oct 2015 at 12:00.
      My System SpecsSystem Spec

  9. #9


    UK
    Posts : 275
    Windows 8.1 64 bit


    Are you sure your USB drive is bootable and in the right format? You could try creating a Windows USB installation drive using the Microsoft Media Creation tool Creating installation media for Windows 8.1 - Windows Help
      My System SpecsSystem Spec

  10. #10


    Posts : 31
    Windows 8.1 Pro


    Quote Originally Posted by KYHI View Post
    I assume you copied the files contained within the ISO to USB stick and did not just copy the ISO file to USB ??
    Wouldn't it just ignore it then just as leaving a usb full of photos would be ignored on boot?
      My System SpecsSystem Spec

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