Windows 8 and 8.1 Forums

Convert BIOS to UEFI

  1. #1


    Posts : 15
    Win 8.1

    Convert BIOS to UEFI


    Hi
    I have windows 8.1 installed on 120gb ssd. I also have a 1tb HDD too. So I was trying to install Hackintosh/Linux when I noticed that the System Reserved partition was on my HDD instead of the SSD. So, I used easybtc to migrate my boot files to my SSD. I deleted the system reserved partition. Now I want to convert my BIOS to UEFI. I have Z87 pro mobo.

    I tried this tutorial: https://social.technet.microsoft.com...n-to-uefi.aspx

    But it seems to be geared at the C drive, where I don't have room for that 350mb as disk utility wont let me shrink it.

    Edit: would downloading a third party partitioner, shrinking C about 350mb, or whatever is the minimum, and then use that new space as described in the guide work?

      My System SpecsSystem Spec

  2. #2


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


    If you have Windows 7 installed, & two HDD's, you can clone Legacy to UEFI.
    Migrate BIOS x64 install to UEFI. Solved - Windows 7 Help Forums

    The above is for Windows 7 x64, Paragon 14 has a app for Windows 8/8.1.
      My System SpecsSystem Spec

  3. #3


    Posts : 15
    Win 8.1


    Quote Originally Posted by theog View Post
    If you have Windows 7 installed, & two HDD's, you can clone Legacy to UEFI.
    Migrate BIOS x64 install to UEFI. Solved - Windows 7 Help Forums

    The above is for Windows 7 x64, Paragon 14 has a app for Windows 8/8.1.
    Well I have 8.1 and, as i said, an SSD that has the OS and an HDD

    It sounds like that program would move my OS to the HDD... Is that right?

    I need it to stay on my SSD
      My System SpecsSystem Spec

  4. #4


    Posts : 5,360
    7/8/ubuntu/Linux Deepin


    as disk utility wont let me shrink it.
    Built in disk mgmt wil not let you shrink from the left. It never allows that.

    You need a 3rd party partition program. Ther are several free versions around partition wizard (Home Edition ), aomei partition assistant (Standard Edition), etc.
      My System SpecsSystem Spec

  5. #5


    Posts : 15
    Win 8.1


    Yeap I just used EaseUS, made ~1gb free, followed the guide for that space. It worked and now I am using UEFI instead of Legacy BIOS. Neato
      My System SpecsSystem Spec

  6. #6


    Posts : 1,121
    Windows 8.1 x64


    Quote Originally Posted by Lillz View Post
    Yeap I just used EaseUS, made ~1gb free, followed the guide for that space. It worked and now I am using UEFI instead of Legacy BIOS. Neato
    How do you know you are usng UEFI? Any chance of a Disk Management picture being attached so we can check?
      My System SpecsSystem Spec

  7. #7


    Hafnarfjörður IS
    Posts : 4,376
    Linux Centos 7, W8.1, W7, W2K3 Server W10


    Hi there

    While what you did is fine I think we should amend your post - the built in BIOS itself can't be altered unless you can "flash it" - which I would NOT recommend doing except in the most extreme situation - if it doesn't have UEFI support then you can't use UEFI. Most reasonably modern machines have it but can also operate in "Legacy mode" i.e they can boot non UEFI OS'es.

    Linux distros recognize UEFI (at least recent ones do) and you don't need to mess around with easy BCD or whatever - the GRUB loader will take care of all that -- if you want to dual boot install WINDOWS FIRST then grub will give you a boot choice of Windows / your Linux system(s) at boot time.

    Advantage of using the Grub loader is that it can actually be installed anywhere -- even on external USB devices so you can keep your Windows boot system totally untouched (normal boot goes straight into windows) - and when you want to boot Linux just boot from the USB -- note the Linux distro itself can also be on your internal SSD - you only neec to start GRUB from the usb.

    To cleanse the windows boot area - boot from your windows install / recovery media and choose after repair system == recovery tools ==> command prompt.

    Then simply type the following two commands

    fixmbr
    fixboot

    job done -- nice untouched windows boot sectors and you've got an easy way of booting any Linux distro you want simply by running GRUB from the USB stick (even an old cheap 512 MB one will do --=Grub is only a small boot loader program !!).

    Cheers
    jimbo
      My System SpecsSystem Spec

  8. #8


    Posts : 15
    Win 8.1


    Screenshots: Click image for larger versionClick image for larger version

    As you can see, it is UEFI

    @Jimbo - Yeah I know all that; I have a z87 mobo and it does support and run a UEFI system, so it was silly of me to install windows 8.1 w/Legacy BIOS in the first place. I don't notice much of a difference in boot time (my computer boots in 5-6 seconds regardless). The main reason I did this was so I could play around with Hackintosh easier.
      My System SpecsSystem Spec

  9. #9


    Posts : 1,121
    Windows 8.1 x64


    Yep, you are using UEFI. When you boot, do you pick the Windows Boot Manager on the SSD?

    A couple of things might be discussed, the Hidden partition (97.79 GB) and the Drive Letter A: Is that related to some of the playing you are doing?
      My System SpecsSystem Spec

  10. #10


    Posts : 15
    Win 8.1


    Yeah that 97gb is for Hackintosh, as well as that EFI (OSX uses UEFI as well). A: is just my storage drive for games and stuff. Yeah, right now it just boots into Windows without me doing anything. My next thing is to install Chameleon boot loader for OSX/Win8 dual boot
      My System SpecsSystem Spec

Page 1 of 2 12 LastLast
Convert BIOS to UEFI
Related Threads
UEFI BIOS Firmware settings in General Support
I can't see UEFI BIOS Firmware settings in Windows 8.1 repair Troubleshoot section.
Solved Switching from Legacy BIOS to UEFI in Installation & Setup
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...
Solved How do I change my BIOS into UEFI in Drivers & Hardware
Hi EightForum! I have some question on how to change my BIOS into UEFI. I tried to flash a UEFI BIOS file attached on Acer website but it wont start flashing. The latest version of UEFI installer is not responding when I want to flash it, the older version said I need to have the same type of BIOS...
Hi There, I just built a desktop with a sabertooth x79 motherboard, and am running Windows 8.1 pro 64-bit. When I click the UEFI BIOS Firmware live tile via the change PC settings>update and recovery>recovery>etc. my computer reboots normally to Windows and will not open BIOS. I have tried...
Changing from Bios motherboard to UEFI in Performance & Maintenance
I wish to change my system to use UEFI from the older bios system but I have run into the single problem of changing the disk from MBR to GPT I have lots of things I need to back up and i want my windows system to be how it is now. The problem is Windows system image apparently does not like ...
I want to keep my RecoveryPartition, but also want to partition the 750GB HDD into three partitions. What tools may help, what are the cavetats, where are the minefields? Is there a tutorial somewhere?
By Woody Leonhard If you've ever struggled with your PC's BIOS — or been knee-capped by a rootkit that assailed the BIOS — you undoubtedly wondered why this archaic part of every PC wasn't scrapped long ago. Well, be of good cheer: Windows 8 will finally pull the PC industry out of the BIOS...
Eight Forums Android App Eight Forums IOS App Follow us on Facebook