Solved Switching from Legacy BIOS to UEFI

Kasv

New Member
Messages
11
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.co...erting-windows-bios-installation-to-uefi.aspx
 
Last edited:

My Computer

System One

  • OS
    Windows 8.1 x64
    Computer type
    Laptop
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)

12803d1355373594-uefi-unified-extensible-firmware-interface-install-windows-8-uefi_usb_boot_menu.jpg


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 Computer

System One

  • OS
    Windows 10
    Computer type
    Laptop
    System Manufacturer/Model
    Lenovo G580
    CPU
    Intel Core i5-3230M
    Memory
    8 GB
    Graphics Card(s)
    Intel HD Graphics 4000
    Browser
    Microsoft Edge
    Antivirus
    Windows Defender, standard user account
    Other Info
    UEFI firmware (BIOS) embedded Windows 8 product key.
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 Computer

System One

  • OS
    Windows 8.1 x64
    Computer type
    Laptop
Make you are booting the DVD/USB disk in UEFI mode.

Windows 8 Downgrade-006 SB for posting.PNG
 

My Computer

System One

  • OS
    ME, XP,Vista,Win7,Win8,Win8.1
    Computer type
    PC/Desktop
    Other Info
    Notebooks x 3

    Desktops x 5

    Towers x 4
Looking at your screenshot YES that is the one.
 

My Computer

System One

  • OS
    ME, XP,Vista,Win7,Win8,Win8.1
    Computer type
    PC/Desktop
    Other Info
    Notebooks x 3

    Desktops x 5

    Towers x 4
theog,

Thank you for your assistance! If I could buy you a beer right now I would!
 

My Computer

System One

  • OS
    Windows 8.1 x64
    Computer type
    Laptop
You are welcome. :dinesh:
 

My Computer

System One

  • OS
    ME, XP,Vista,Win7,Win8,Win8.1
    Computer type
    PC/Desktop
    Other Info
    Notebooks x 3

    Desktops x 5

    Towers x 4
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