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Win 8.1 UEFI Installation from a bootable usb


nikos

Member
Member
Posts
68
#1
I have a Dell Inspiron 7720

I have created an uefi bootable usn flash disk with rufus 1.4b

I'm trying to boot from it so i can create a Windows 8.1 uefi installation and the problem is that the usb flash disk wont boot.

I have secure boot enabled and
legacy option rom disabled.

Am i doing something wrong?
 

My Computer

System One

  • OS
    Windows 8 Pro 64-bit

theog

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5,591
#2
Are you booting the USB/DVD in UEFI mode?

Windows 8 Downgrade-006 SB for posting.PNG
 

My Computer

System One

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Sunnova

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19
#3
I have a Dell Inspiron 7720

I have created an uefi bootable usn flash disk with rufus 1.4b

I'm trying to boot from it so i can create a Windows 8.1 uefi installation and the problem is that the usb flash disk wont boot.

I have secure boot enabled and
legacy option rom disabled.

Am i doing something wrong?
I found a post on the dell community forums that might help.

17R 7720 SE: Lost BIOS Access - Laptop General Hardware Forum - Laptop - Dell Community

The post tells you how to go into the bios and add the boot option for your usb.
 

My Computer

System One

  • OS
    Windows 8.1 Pro with Media Center 64-bit
    Computer type
    PC/Desktop
    System Manufacturer/Model Number
    HP Envy H8-1534
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    AMD FX(tm)-6350 Six-Core Processor
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    10GB
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Mr Sardonicus

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Chicago IL, USA

Posts
203
#4

My Computer

System One

  • OS
    Windows 8.1 Pro
    Computer type
    PC/Desktop
    System Manufacturer/Model Number
    Self built
    CPU
    Intel Core i7-4790
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    GA-Z87X-D3H
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    G.SKILL 8GB (2 x 4GB) DDR3 F3-10666CL9D-8GBNT
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nikos

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Member
Posts
68
#5
Mr Sardonicus i have followed both methods but i just cannot see an entry for my usb.


Why it is not present?

When i try uefi instalaltion is it ok to have?

secure boot: enable
legacy option disbale?
 

My Computer

System One

  • OS
    Windows 8 Pro 64-bit

Mr Sardonicus

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203
#6
Have you tried the flash drive in the USB 2.0 port.
 

My Computer

System One

  • OS
    Windows 8.1 Pro
    Computer type
    PC/Desktop
    System Manufacturer/Model Number
    Self built
    CPU
    Intel Core i7-4790
    Motherboard
    GA-Z87X-D3H
    Memory
    G.SKILL 8GB (2 x 4GB) DDR3 F3-10666CL9D-8GBNT
    Graphics Card(s)
    Sapphire ATI Radeon R7 250
    Sound Card
    Realtek ALC892
    Monitor(s) Displays
    Samsung UN32EH5000, Dell 1703FPT
    Screen Resolution
    1920 x 1080
    Hard Drives
    WD5003AZEX
    WD10EZEX
    Samsung HD103SJ
    Samsung 128 GB 840 PRO
    PSU
    SeaSonic M12II SS-500GM
    Case
    Fractal Design Define R4
    Cooling
    Zalman CNPS9900ALED
    Keyboard
    Logitech K800
    Mouse
    Logitech M705
    Internet Speed
    16 Mbps
    Browser
    Firefox
    Antivirus
    Avast
    Other Info
    Bose Companion 2 Multimedia Speakers

nikos

Member
Member
Posts
68
#7
I have 3 x usb3 ports with the label SS in the side. I see no usb2 port in my 7720. Is there any?

And what the SS means?
 

My Computer

System One

  • OS
    Windows 8 Pro 64-bit

nikos

Member
Member
Posts
68
#8
I have a Dell Inspiron 7720

I have created an uefi bootable usn flash disk with rufus 1.4b

I'm trying to boot from it so i can create a Windows 8.1 uefi installation and the problem is that the usb flash disk wont boot.

I have secure boot enabled and
legacy option rom disabled.

Am i doing something wrong?
I found a post on the dell community forums that might help.

17R 7720 SE: Lost BIOS Access - Laptop General Hardware Forum - Laptop - Dell Community

The post tells you how to go into the bios and add the boot option for your usb.
Why si there a need to add my usb flash boot as an option?

Shouldnt it detect ti automatically as a device?
when i enable "load legecy rom" i can see it in the list, but i dont at boot time if i press F12.
 

My Computer

System One

  • OS
    Windows 8 Pro 64-bit