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Solved Windows 8 installation issue with UEFI Bios mode


Posts
3
#1
Hi All,

I bought a new Acer V5-572 Laptop which came pre-installed with Linux and BIOS was UEFI mode selected. To install windows 8.1, I made a installable USB of windows 8.1 and selected Legacy boot in BIOS to boot from it. While installing I formatted the harddisk completely using DISKPART "clean" command. Finally, Windows 8.1 got installed on Legacy boot mode.

But now when I changed the boot mode from Legacy to UEFI, it doesnt boot from anything(not even from same USB) and gives error i.e no bootable device.
I tried ALT+F10 for going to Acer Factory setting, even that doesnt work. May be I have formatted System Recovery/Factory settings partition as well.


Can anybody help me here to boot from Windows - USB on UEFI mode ?

Thanks
Nitin
 

My Computer

System One

  • OS
    Windows 8

Saltgrass

New Member
Pro User
Posts
1,121
#2
I suppose my first question would be why would you want to install Windows 8 as Legacy?

If you have a Bootable Windows 8 flash drive, you need to use the Boot Device Menu and select the UEFI version of that device to boot into the UEFI configuration. The bios has to be set to allow for UEFI devices and the flash drive has to be formatted in the FAT32 configuration.

It won't boot anything as UEFI because you do not have a UEFI configured install of Windows 8.. or Linux.
 

My Computer

System One

  • OS
    Windows 8.1 x64
    Computer type
    PC/Desktop
    System Manufacturer/Model Number
    Home Grown
    CPU
    i7 3770K
    Motherboard
    ASUS P8Z77 -v Pro, Z87-Expert
    Memory
    16 G
    Graphics Card(s)
    EVGA GTX 680 Classified (2)
    Hard Drives
    Kingston SSD 240 GB

genet

New Member
Guru
Posts
879
#3

My Computer

System One

  • OS
    Windows 10
    Computer type
    Laptop
    System Manufacturer/Model Number
    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.
Posts
3
#4
UEFI Bootable USB Flash Drive - Create in Windows

To create a bootable UEFI USB flash drive using Rufus.
- Connect your USB flash drive.
- Click/tap on the browse icon and select your Windows 8.1 64-bit ISO image file.
- Under Partition scheme and target system type, select GPT partition scheme for UEFI Computer
- Under File system, select FAT32
- Click/tap on Start.

Windows 7/8 setup: Installing using Legacy BIOS Boot Mode or UEFI Boot Mode.

Thanks it works... :)
 

My Computer

System One

  • OS
    Windows 8