Windows 8 and 8.1 Forums


Switching from Legacy BIOS to UEFI

  1. #1


    Posts : 11
    Windows 8.1 x64

    Switching from Legacy BIOS to UEFI


    Hello,

    Right before I performed a clean install of Windows 8.1 x64 on my Inspiron 3520, I switched to the Legacy BIOS *facepalm*.

    When I enter the legacy BIOS and enabled "secure boot", I performed a restart that gave the following message "internal hard disk drive not found, to resolve this issue, try to reseat the drive. No bootable devices--strike F1 to retry boot, F2 enter setup menu, F5 enter PSA". Of course, when I go back into the BIOS and disable secure boot, it reverts back to legacy and boots up Windows 8 just fine. What I'd like to know is, how can I revert back to UEFI so I can change the boot-up option and perform a clean install under UEFI.

    Any help would be greatly appreciated! I've found a couple articles but I just want to make sure I'm headed in the right direction and if maybe there is a safer and easier way to get this done...

    Making the Switch to UEFI | sepago

    https://social.technet.microsoft.com...n-to-uefi.aspx
    Last edited by Kasv; 29 Jan 2014 at 09:12.

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  2. #2


    Posts : 879
    Windows 10


    UEFI (Unified Extensible Firmware Interface) - Install Windows 8 with

    4. Press whatever key (ex: F11) it shows to boot to your motherboard's boot menu, and select to boot from the listed UEFI DVD or UEFI USB. (see screenshot below)



    Secure Boot

    Secure Boot only work in UEFI boot mode, when you enable Secure Boot in your PC's UEFI settings.

    Secure Boot protect users from rootkits and other low-level malware attacks by blocking unauthorized (non-signed) executables and drivers from being loaded during the boot process.

    Protecting the pre-OS environment with UEFI - Building Windows 8 - Site Home - MSDN Blogs

    Secure Boot - Enable or Disable in UEFI

    Secure Boot - Confirm Enabled or Disabled in Windows 8
      My System SpecsSystem Spec

  3. #3


    Posts : 11
    Windows 8.1 x64


    genet,

    Thank you for the information! This helped clear things up! Hopefully it'll be smooth sailing from here. I'll report back in a few.
      My System SpecsSystem Spec

  4. #4


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


    Make you are booting the DVD/USB disk in UEFI mode.

    Click image for larger version
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  5. #5


    Posts : 11
    Windows 8.1 x64


    theog,

    Is the one I've selected correct? (just double checking)

    Click image for larger version
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  6. #6


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


    Looking at your screenshot YES that is the one.
      My System SpecsSystem Spec

  7. #7


    Posts : 11
    Windows 8.1 x64


    theog,

    Thank you for your assistance! If I could buy you a beer right now I would!
      My System SpecsSystem Spec

  8. #8


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


    You are welcome.
      My System SpecsSystem Spec

Switching from Legacy BIOS to UEFI
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