Windows 8 and 8.1 Forums


BIOS Mode - See if Windows Boot in UEFI or Legacy Mode

  1. #1
    BIOS Mode - See if Windows Boot in UEFI or Legacy Mode

    BIOS Mode - See if Windows Boot in UEFI or Legacy Mode
    How to Check if Windows is Booted in UEFI or Legacy BIOS Mode
    Published by Brink is offline
    09 Aug 2013
    Default BIOS Mode - See if Windows Boot in UEFI or Legacy Mode

    Published by


    Brink's Avatar
    Administrator

    Join Date: Jul 2009
    Posts: 21,608

    How to Check if Windows is Booted in UEFI or Legacy BIOS Mode


    information   Information
    When the PC starts, the firmware interface controls the booting process of the PC, and then passes control to Windows or another operating system.

    UEFI is a replacement for the older BIOS firmware interface and the Extensible Firmware Interface (EFI) 1.10 specifications.

    For more information, see:




    This tutorial will show you how to see if your Windows is booted in UEFI or legacy BIOS (CSM) mode in Windows 7, Windows 8, and Windows 8.1.





    OPTION ONE
    Check if UEFI or Legacy in Disk Mangement in Windows 7, 8, and 8.1

    1.
    Do step 2 or 3 below.

    2. In Windows 8 and 8.1, open the WIN+X Power Users menu, click/tap on Disk Management, and go to step 4 below.

    Name:  WIN+X.jpg
Views: 238228
Size:  38.5 KB

    3. Press the + R keys to open the Run dialog, type diskmgmt.msc, click/tap on OK, and go to step 4 below.

    4. If prompted by UAC, then click/tap on Yes.

    5.
    If your Windows disk shows having an EFI partition like below, then it's installed with UEFI. If not, then it's Legacy BIOS.

    Click image for larger version

    Click image for larger version





    OPTION TWO
    Check if UEFI or Legacy in System Information in Windows 8 and 8.1

    1. Press the + R keys to open the Run dialog, type msinfo32, and press Enter.

    2. In the right pane of System Summary in System Information, see if the BIOS Mode value says Legacy or UEFI. (see screenshots below)

    Click image for larger version

    Click image for larger version





    OPTION THREE
    Check if UEFI or Legacy in setupact.log in Windows 7, 8, and 8.1

    1. In Windows Explorer (Windows 7) or File Explorer (Windows 8/8.1) navigate to the location below and open the setupact.log file.

    C:\Windows\Panther

    2. With the setupact.log file opened in Notepad, click on Edit (Menu bar) and Find, or press the Ctrl+F keys.

    3. Type in this below, and click/tap on Find Next or press Enter. (see screenshot below)

    Detected boot environment



    Name:  setupact-1.jpg
Views: 245599
Size:  15.4 KB

    4. Close the Find dialog.

    5. You will see it say EFI (UEFI) or BIOS (Legacy BIOS).


    Callback_BootEnvironmentDetect: Detected boot environment: BIOS

    Callback_BootEnvironmentDetect: Detected boot environment: EFI


    Click image for larger version





    OPTION FOUR
    Check if UEFI or Legacy in WinPE for Windows 8 and 8.1

    NOTE: This option can be useful if you are unable to boot into Windows or in WinPE.

    1. Open a command prompt at boot.

    2. In the command prompt at boot, type the command below and press Enter. (see screenshot below)

    wpeutil UpdateBootInfo

    3. In the command prompt at boot, type the command below and press Enter.

    reg query HKLM\System\CurrentControlSet\Control /v PEFirmwareType

    4. This command returns 0x1 if the PC boots in Legacy BIOS mode, or 0x2 if the PC boots in UEFI mode.

    Click image for larger version



    That's it,
    Shawn


  2. #1


    Posts : 17
    Windows 7 Home Premium


    I tried all methods but failed to find out the boot mode.

    I tried looking for the log file in Windows/Panther but there is no file to search the "Detected boot environment"

    I also looked in System Information but there is no category that says 'Bios Mode'.


    Also tried method 3 even though I don't have Windows 8/8.1 and still doesn't work.

      My System SpecsSystem Spec

  3. #2


    Posts : 21,608
    64-bit Windows 10


    Hello Penny,

    Are you saying that you do not have a "C:\Windows\Panther\setupact.log" file?

    How about with Option One?

    What brand and model number is your PC or motherboard?
    Last edited by Brink; 27 Oct 2013 at 11:50. Reason: addition
      My System SpecsSystem Spec

  4. #3


    Posts : 17
    Windows 7 Home Premium


    Quote Originally Posted by Brink View Post
    Hello Penny,

    Are you saying that you do not have a "C:\Windows\Panther\setupact.log" file?

    How about with Option One?

    What brand and model number is your PC or motherboard?

    Yeah, I don't have the setupact.log file in that directory.

    I tried option 1 but there is no Bios type category.


    My laptop is HP Pavilion g6 Notebook PC.

    The BIOS Version is Hewlett-Packard F.34 8/16/2011
    SMBIOS Version: 2.7
    Boot Device: /Device/HarddiskVolume1
      My System SpecsSystem Spec


  5. #4


    Posts : 17
    Windows 7 Home Premium


    I found my problem, there was something wrong with the UAC.

    Anyways, looking at my mine attachment, I guess I have Legacy mode right?

    Click image for larger version
      My System SpecsSystem Spec

  6. #5


    Posts : 21,608
    64-bit Windows 10


    Yep, that's correct. You're Windows 7 has been installed in legacy and not UEFI.

    That's typically how OEMs install Windows 7 though.

    Do you know the full model number of your HP Pavilion G6? It looks like some models may not support UEFI.

    HP Pavilion g6 Notebook PC series
      My System SpecsSystem Spec

  7. #6


    Posts : 17
    Windows 7 Home Premium


    Quote Originally Posted by Brink View Post
    Yep, that's correct. You're Windows 7 has been installed in legacy and not UEFI.

    That's typically how OEMs install Windows 7 though.

    Do you know the full model number of your HP Pavilion G6? It looks like some models may not support UEFI.

    HP Pavilion g6 Notebook PC series
    It's a HP Pavilion g6-1b60us.

    HP Pavilion g6-1b60us Notebook PC | HP® Support
      My System SpecsSystem Spec

  8. #7


    Posts : 21,608
    64-bit Windows 10


    Penny,

    Looking through your manual and drivers at the HP site, I only see mention of BIOS and no UEFI. It appears that you model may not support UEFI installations.
      My System SpecsSystem Spec

  9. #8


    Posts : 17
    Windows 7 Home Premium


    Quote Originally Posted by Brink View Post
    Penny,

    Looking through your manual and drivers at the HP site, I only see mention of BIOS and no UEFI. It appears that you model may not support UEFI installations.
    So does this mean I can't use Rufus to install Windows 8.1 on my flashdrive?
      My System SpecsSystem Spec

  10. #9


    Posts : 21,608
    64-bit Windows 10


    You could still use Rufus to create a Windows 8.1 installation USB flash drive, but you would need to do so without using the GPT for UEFI option, you would use MBR for BIOS.

    ...or you could use this below instead.

    Create Bootable USB or DVD with Windows 8 ISO
      My System SpecsSystem Spec

Page 1 of 3 123 LastLast
BIOS Mode - See if Windows Boot in UEFI or Legacy Mode

Similar Threads
Tutorial Forum
Use legacy boot mode in Windows 8.1
I've been wondering if it's possible to use the legacy (Windows 7 and earlier) BIOS instead of UEFI in Windows 8.1. In my BIOS settings, there is an option to enable the legacy boot mode, but Windows won't boot whenever this is enabled (I get the message 'Operating System not found' instead). Is...
General Support
UEFI only Boot Mode for a Future Build, PCIe info?
Hi, in the future I am planning a computer build that hopes to run upon a UEFI-install of 64-bit Windows 8.1. Looking into the specifications for Fast Boot and UEFI mode and all that jazz, it says I need UEFI Option Roms for my GPU as well as a UEFI motherboard. However I am confused as to... the...
Drivers & Hardware
Windows 8 installation issue with UEFI Bios mode
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...
Installation & Setup
Samsung won't boot install USB in UEFI mode. WinPE alt?
So I've searched, and I've tested, and now I'm about to turn my laptop into a frisbee and never buy a Samsung PC again. In short, I bought an ATIV 7 whose previous owner had downgraded to Win7. I wanted to put Win 8 on and I have a volume license as well as the OEM key so I burned the ISO...
Installation & Setup
bare-metal restore of 8.1 in UEFI secure boot mode
Hi, I built a new PC running 8.1, GPT, UEFI secure boot mode, everything. I'm now at the point where I'm ready to start migrating my data to it, but before I do that, I need to get some backup software that offers me the option to boot from a recovery CD and restore from an image file backup...
General Support
Backup and UEFI Boot Mode
Purchased an Acer Aspire V5 which comes with Windows 8 preloaded. I have two questions in this regard and taking the liberty of putting them in a single thread. Does the Aspire V5 support UEFI booting? I am asking this since I want to use Ubuntu 13 along with Windows 8 and the ubuntu guide says...
Installation & Setup
UEFI Mode keeping my USB from being seen to boot from
Or at least I think thats what's happening. In the past under windows 7 or any other OS you can tell Bios to boot from USB. (or from your version of a quick boot options on system start) I cant do this now. The option wont show. I have read if you disable secure boot and or UEFI mode this will...
Drivers & Hardware

Eight Forums Android App Eight Forums IOS App Follow us on Facebook