Windows 8 and 8.1 Forums


Windows 8 and Windows 8.1 ISO - Download or Create

  1. #240


    UK
    Posts : 275
    Windows 8.1 64 bit


    I've downloaded the Windows 8.1 Update files using my Windows 8 key as described above - thanks to all. My PC (Gigabyte GA-Z77X-UD5H motherboard) is set to UEFI only boot. I can boot Windows 8.1 Update on a USB flash drive in UEFI mode but the Windows 8.1 DVD I burned is not recognised. My original Windows 8 Pro DVD is also not recognised in UEFI boot mode.

    I need to set CSM support to Always in the BIOS for the bootable Windows 8.1 & Windows 8 Pro DVDs to be recognised. Do I need to burn the Windows 8.1 DVD in a particular way for it to boot in UEFI mode or is there another setting I need to make in the BIOS to enable UEFI booting from the installation DVD?

      My System SpecsSystem Spec

  2. #241


    Posts : 22,576
    64-bit Windows 10


    Hello Steve,

    When using UEFI, it's best to always use a USB flash drive instead to make it easier.

    If you have secure boot enabled, it will prevent it from booting from the DVD. See if temporarily disabling secure boot may help.

    Secure Boot - Enable or Disable in UEFI

    Hope this helps for now,
    Shawn
      My System SpecsSystem Spec

  3. #242


    UK
    Posts : 275
    Windows 8.1 64 bit


    I can only boot to the Microsoft Windows 8.1 DVD if I set "UEFI & Legacy Mode" under the CSM BIOS setting on my Gigabyte motherboard. Only my main C: drive appears in the boot menu when I select UEFI only mode. Are my boot BIOS settings working correctly since I understand the Microsoft Windows 8 installation DVD allows installation and repair in UEFI mode? If I boot the Windows 8.1 DVD in CSM legacy mode, will it still repair or re-install a UEFI Windows 8.1 installation?
      My System SpecsSystem Spec

  4. #243


    Posts : 22,576
    64-bit Windows 10


    If CSM legacy mode is enabled, you'll be switched to BIOS mode and won't be able to install in UEFI. You should be able to with "UEFI & Legacy Mode", but you'll need to be sure to select the UEFI labeled boot media.

    Boot to UEFI Mode or Legacy BIOS mode

    Did you see how it worked with only Secure Boot disabled while keeping CSM disabled?
      My System SpecsSystem Spec

  5. #244


    UK
    Posts : 275
    Windows 8.1 64 bit


    I have a LG Bluray BH10LS38 internal drive. This only shows in the boot menu with Legacy & UEFI enabled in the CSM options but without a UEFI prefix when trying to boot from the Windows 8 DVD. However, I originally installed Windows 8 successfully under UEFI using the guide on this forum (confirmed in MSINFO32). There are no boot options for the internal DVD unless CSM is enabled.

    I've just tried booting the Windows 8 DVD from a new Samsung SE-208 external DVD Writer. This shows up in the boot menu with a UEFI prefix using UEFI only mode in the BIOS!

    I'm now very confused why the Windows 8 DVD internal won't boot under in UEFI mode whreas the external DVD drive will. The internal DVD is using the latest firmware.
      My System SpecsSystem Spec

  6. #245


    Posts : 22,576
    64-bit Windows 10


    Odd, not sure why either then.

    Are you able to use a USB instead? USB is much more UEFI friendly.
      My System SpecsSystem Spec

  7. #246


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    USB installs are faster too, if you have a good quality (fast) thumb drive. I can't remember the last time I actually installed from an optical disk. I don't think I even have one for Windows 8, I haven't bothered to burn one.
      My System SpecsSystem Spec

  8. #247


    UK
    Posts : 275
    Windows 8.1 64 bit


    Yes, booting in UEFI mode from a USB flash drive is fine do I'll use that method (or the external DVD). I've logged to the problem with Gigabyte out of curiosity to see what they say about the problems in booting in UEFI mode from the internal DVD.
      My System SpecsSystem Spec

  9. #248


    Posts : 22,576
    64-bit Windows 10


    Steve,

    Did you ever try the DVD with only secure boot disabled?
      My System SpecsSystem Spec

  10. #249


    UK
    Posts : 275
    Windows 8.1 64 bit


    Thanks for your help above.

    I had a reply from LG support about the BluRay drive. They say it was produced in 2011 and may not support UEFI boot in Windows 8.Gues I'll just use the USB drive which is faster.

    I now have a working Windows 8.1 (Upgrade 1?) USB install disc produced using my retail key for Windows 8 Pro.

    I've just bought a Dell laptop which has an OEM version of Windows 8.1 (not Pro edition).

    Can I use the Windows 8.1 USB disc (produced using my Windows 8 Pro key for my desktop PC) to reinstall Windows 8 (not Pro) on my laptop using the Dell OEM Windows 8 product key (located using Belarc Advisor)?
      My System SpecsSystem Spec

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Windows 8 and Windows 8.1 ISO - Download or Create
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