Windows 8 and 8.1 Forums


UEFI USB Disk - Does not boot from UEFI Windows 8.

  1. #1


    Posts : 5
    Windows 8

    UEFI USB Disk - Does not boot from UEFI Windows 8.


    Dear Friends,

    Long time reader of this forum but a first time poster, so please forgive me if this question has already been asked and answered.

    Laptop: ASUS UX31A-DB71, latest BIOS: 218

    Originally my laptop came with Windows 7 and when i looked at disk management my disks were formatted with UEFI schema. One of my friend gave me a UEFI bootable USB drive loaded with Windows 8. So, i thought why not give it a try. So, I created a backup of my OEM Windows 7 and saved the iso files in a seperate external HD (created twice just to be sure . Now, i decided to load the Windows 8. Booted into the BIOS and there is an option to select the USB drive along with the UEFI option for that USB drive. I selected the UEFI option but some reason it does not boot into UEFI. So i decided to select the standard USB install and this option let me install windows 8. In the process of installing i formatted the partitions and made a single partition and installed Windows 8 on it. I am guessing now the drive is not GPT but MBR. I also noticed that his installation USB disk had an option to select either 32bit or 64bit of Windows 8...I find this kind of odd. Would Microsoft create a same iso file with both versions? I am guessing he created the USB from a illegitimate source.
    I am planning on purchasing Windows 8 Pro version as an iso but wanted to be confident that it would work with UEFI architecture.

    Questions:
    1. Why would the system NOT boot from UEFI?
    2. If I download the legitimate iso from Microsoft and wanted to install Window8 Pro via UEFI, I am sure i would have to format my SSD to GPT and how would i go about formatting it during installation?
    3. How would i create a recoverable USB for my iso image i created for Windows 7 via ASUS AI Recovery. Do I need to follow the same procedure as stated in creating bootable USB disk (i.e. FAT32 system) via diskpart utility?

    I know there are a lot of questions but would like to get your feedback before i can move to a next step.

    Thanks,

      My System SpecsSystem Spec

  2. #2


    Posts : 2,156
    Win7 Ult on DIY; Win8 Pro on MBP/Parallels; Win7 Ult on MBP/Boot Camp; Win7 Ult/Win8 Pro on HP


    Welcome. Begin with Clean Install - Windows 8. See the UEFI links in the tutorial: How to Install Windows 8 Using "Unified Extensible Firmware Interface" (UEFI). You also will want to see this tutorial link: How to Do a Clean Install with Windows 8 Upgrade.
      My System SpecsSystem Spec

  3. #3


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


    Welcome to EightForums.

    Microsoft create a same iso file with both versions? I am guessing he created the USB from a illegitimate source.


    Questions:
    1. Why would the system NOT boot from UEFI?
    YES, illegitimate source


    2. If I download the legitimate iso from Microsoft and wanted to install Window8 Pro via UEFI, I am sure i would have to format my SSD to GPT and how would i go about formatting it during installation?
    3. How would i create a recoverable USB for my iso image i created for Windows 7 via ASUS AI Recovery. Do I need to follow the same procedure as stated in creating bootable USB disk (i.e. FAT32 system) via diskpart utility?
    For install & format:
    As your MOBO's has have a uEFI/BIOS firmware.
    How to install Windows 64 bit on a uEFI/BIOS firmware:

    UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with - Windows 7 Help Forums
    or
    UEFI (Unified Extensible Firmware Interface) - Install Windows 8 with

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

  4. #4


    Posts : 5
    Windows 8


    Quote Originally Posted by znod View Post
    WelcomeBegin with Clean Install - Windows 8. See the UEFI links in the tutorial.
    Sure but that wouldn't give me a UEFI partition architecture would it?
      My System SpecsSystem Spec

  5. #5


    Posts : 2,156
    Win7 Ult on DIY; Win8 Pro on MBP/Parallels; Win7 Ult on MBP/Boot Camp; Win7 Ult/Win8 Pro on HP


    The UEFI link I mentioned (see your quote) would. Note also that I expanded on my post a bit above.
      My System SpecsSystem Spec

  6. #6


    Posts : 5
    Windows 8


    Quote Originally Posted by theog View Post
    Welcome to EightForums.

    Microsoft create a same iso file with both versions? I am guessing he created the USB from a illegitimate source.


    Questions:
    1. Why would the system NOT boot from UEFI?
    YES, illegitimate source


    2. If I download the legitimate iso from Microsoft and wanted to install Window8 Pro via UEFI, I am sure i would have to format my SSD to GPT and how would i go about formatting it during installation?
    3. How would i create a recoverable USB for my iso image i created for Windows 7 via ASUS AI Recovery. Do I need to follow the same procedure as stated in creating bootable USB disk (i.e. FAT32 system) via diskpart utility?
    For install & format:
    As your MOBO's has have a uEFI/BIOS firmware.
    How to install Windows 64 bit on a uEFI/BIOS firmware:

    UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with - Windows 7 Help Forums
    or
    UEFI (Unified Extensible Firmware Interface) - Install Windows 8 with

    For USB Pen Drive:
    UEFI Bootable USB Flash Drive - Create in Windows
    Thank you!
    I will get the legitimate iso and report back to this forum with my findings. I just need to have a serious conversations with my friend for providing the USB.
      My System SpecsSystem Spec

  7. #7


    Posts : 2,156
    Win7 Ult on DIY; Win8 Pro on MBP/Parallels; Win7 Ult on MBP/Boot Camp; Win7 Ult/Win8 Pro on HP
      My System SpecsSystem Spec

  8. #8


    Posts : 5
    Windows 8


    Quote Originally Posted by znod View Post
    All is good here, downloaded a legitimate copy of X64 Windows 8 Pro created a bootable USB stick and now i have UEFI. I am very pleased, thank you very much for all your help and guide.
      My System SpecsSystem Spec

  9. #9


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


    You are welcome, well done.
      My System SpecsSystem Spec

  10. #10


    superb
      My System SpecsSystem Spec

UEFI USB Disk - Does not boot from UEFI Windows 8.
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