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


Brink

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mvp
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BIOS Mode - See if Windows Boot in UEFI or Legacy Mode
This tutorial will show you how to see if your Windows is booted in UEFI or legacy BIOS mode in Windows 7, Windows 8, and Windows 8.1.
Published by Brink
#1
ByLine
How to Check if Windows is Booted in UEFI or Legacy BIOS Mode
Synopsis
This tutorial will show you how to see if your Windows is booted in UEFI or legacy BIOS mode in Windows 7, Windows 8, and Windows 8.1.
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.​
WIN+X.jpg
3. Press the :winkey: + 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.​
UEFI_Disk_Management.jpg
Legacy_BIOS_Disk_Management.jpg





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

1. Press the :winkey: + 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)​
msinfo32_Legacy.jpg
msinfo32_UEFI.jpg






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
setupact-1.jpg
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
setupact-2.jpg





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.
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.​
UEFI_or_Legacy_Command.jpg



That's it,
Shawn


 
Last edited by a moderator:

My Computer

System One

  • OS
    64-bit Windows 10
    Computer type
    PC/Desktop
    System Manufacturer/Model Number
    Custom self built
    CPU
    Intel i7-8700K OC'd to 5 GHz
    Motherboard
    ASUS Maximus X Code Z370
    Memory
    16 GB (8GBx2) G.SKILL TridentZ DDR4 3200 MHz
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    6TB WD Black WD6001FZWX
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    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    Linksys EA9500 router,
    Arris SB6190 cable modem,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Lumia 1520 phone
Posts
17
#2
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 Computer

System One

  • OS
    Windows 7 Home Premium

Brink

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mvp
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#3
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:

My Computer

System One

  • OS
    64-bit Windows 10
    Computer type
    PC/Desktop
    System Manufacturer/Model Number
    Custom self built
    CPU
    Intel i7-8700K OC'd to 5 GHz
    Motherboard
    ASUS Maximus X Code Z370
    Memory
    16 GB (8GBx2) G.SKILL TridentZ DDR4 3200 MHz
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    3 x 27" Asus VE278Q
    Screen Resolution
    1920x1080
    Hard Drives
    250GB Samsung 960 EVO M.2,
    256GB OCZ Vector,
    6TB WD Black WD6001FZWX
    8TB WD MyCloudEX2Ultra NAS
    PSU
    OCZ Series Gold OCZZ1000M 1000W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master
    Internet Speed
    300 Mb/s Download and 30 Mb/s Upload
    Browser
    Internet Explorer 11
    Antivirus
    Malwarebyte Anti-Malware Premium
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    Linksys EA9500 router,
    Arris SB6190 cable modem,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Lumia 1520 phone
Posts
17
#4
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 Computer

System One

  • OS
    Windows 7 Home Premium

Brink

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mvp
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23,104
#6
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 Computer

System One

  • OS
    64-bit Windows 10
    Computer type
    PC/Desktop
    System Manufacturer/Model Number
    Custom self built
    CPU
    Intel i7-8700K OC'd to 5 GHz
    Motherboard
    ASUS Maximus X Code Z370
    Memory
    16 GB (8GBx2) G.SKILL TridentZ DDR4 3200 MHz
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    3 x 27" Asus VE278Q
    Screen Resolution
    1920x1080
    Hard Drives
    250GB Samsung 960 EVO M.2,
    256GB OCZ Vector,
    6TB WD Black WD6001FZWX
    8TB WD MyCloudEX2Ultra NAS
    PSU
    OCZ Series Gold OCZZ1000M 1000W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master
    Internet Speed
    300 Mb/s Download and 30 Mb/s Upload
    Browser
    Internet Explorer 11
    Antivirus
    Malwarebyte Anti-Malware Premium
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    Linksys EA9500 router,
    Arris SB6190 cable modem,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Lumia 1520 phone
Posts
17
#7

My Computer

System One

  • OS
    Windows 7 Home Premium

Brink

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mvp
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#8
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 Computer

System One

  • OS
    64-bit Windows 10
    Computer type
    PC/Desktop
    System Manufacturer/Model Number
    Custom self built
    CPU
    Intel i7-8700K OC'd to 5 GHz
    Motherboard
    ASUS Maximus X Code Z370
    Memory
    16 GB (8GBx2) G.SKILL TridentZ DDR4 3200 MHz
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    3 x 27" Asus VE278Q
    Screen Resolution
    1920x1080
    Hard Drives
    250GB Samsung 960 EVO M.2,
    256GB OCZ Vector,
    6TB WD Black WD6001FZWX
    8TB WD MyCloudEX2Ultra NAS
    PSU
    OCZ Series Gold OCZZ1000M 1000W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master
    Internet Speed
    300 Mb/s Download and 30 Mb/s Upload
    Browser
    Internet Explorer 11
    Antivirus
    Malwarebyte Anti-Malware Premium
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    Linksys EA9500 router,
    Arris SB6190 cable modem,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Lumia 1520 phone

Brink

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mvp
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23,104
#10

My Computer

System One

  • OS
    64-bit Windows 10
    Computer type
    PC/Desktop
    System Manufacturer/Model Number
    Custom self built
    CPU
    Intel i7-8700K OC'd to 5 GHz
    Motherboard
    ASUS Maximus X Code Z370
    Memory
    16 GB (8GBx2) G.SKILL TridentZ DDR4 3200 MHz
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    3 x 27" Asus VE278Q
    Screen Resolution
    1920x1080
    Hard Drives
    250GB Samsung 960 EVO M.2,
    256GB OCZ Vector,
    6TB WD Black WD6001FZWX
    8TB WD MyCloudEX2Ultra NAS
    PSU
    OCZ Series Gold OCZZ1000M 1000W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master
    Internet Speed
    300 Mb/s Download and 30 Mb/s Upload
    Browser
    Internet Explorer 11
    Antivirus
    Malwarebyte Anti-Malware Premium
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    Linksys EA9500 router,
    Arris SB6190 cable modem,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Lumia 1520 phone

Alamir101

New Member
Posts
4
#11
So I'm on a Windows 8 laptop, now if my computer is UEFI, is there anyway to switch it to Legacy?
 

My Computer

System One

  • OS
    Windows 8
    Computer type
    Laptop
    System Manufacturer/Model Number
    HP Envy x2 11-g010nr

Brink

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mvp
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23,104
#12

My Computer

System One

  • OS
    64-bit Windows 10
    Computer type
    PC/Desktop
    System Manufacturer/Model Number
    Custom self built
    CPU
    Intel i7-8700K OC'd to 5 GHz
    Motherboard
    ASUS Maximus X Code Z370
    Memory
    16 GB (8GBx2) G.SKILL TridentZ DDR4 3200 MHz
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    3 x 27" Asus VE278Q
    Screen Resolution
    1920x1080
    Hard Drives
    250GB Samsung 960 EVO M.2,
    256GB OCZ Vector,
    6TB WD Black WD6001FZWX
    8TB WD MyCloudEX2Ultra NAS
    PSU
    OCZ Series Gold OCZZ1000M 1000W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master
    Internet Speed
    300 Mb/s Download and 30 Mb/s Upload
    Browser
    Internet Explorer 11
    Antivirus
    Malwarebyte Anti-Malware Premium
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    Linksys EA9500 router,
    Arris SB6190 cable modem,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Lumia 1520 phone

Alamir101

New Member
Posts
4
#13

My Computer

System One

  • OS
    Windows 8
    Computer type
    Laptop
    System Manufacturer/Model Number
    HP Envy x2 11-g010nr

Brink

Administrator
Administrator
mvp
Posts
23,104
#14
Please go ahead and create a new thread for this issue since it will be detailed and go off topic from this tutorial. :)
 

My Computer

System One

  • OS
    64-bit Windows 10
    Computer type
    PC/Desktop
    System Manufacturer/Model Number
    Custom self built
    CPU
    Intel i7-8700K OC'd to 5 GHz
    Motherboard
    ASUS Maximus X Code Z370
    Memory
    16 GB (8GBx2) G.SKILL TridentZ DDR4 3200 MHz
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    3 x 27" Asus VE278Q
    Screen Resolution
    1920x1080
    Hard Drives
    250GB Samsung 960 EVO M.2,
    256GB OCZ Vector,
    6TB WD Black WD6001FZWX
    8TB WD MyCloudEX2Ultra NAS
    PSU
    OCZ Series Gold OCZZ1000M 1000W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master
    Internet Speed
    300 Mb/s Download and 30 Mb/s Upload
    Browser
    Internet Explorer 11
    Antivirus
    Malwarebyte Anti-Malware Premium
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    Linksys EA9500 router,
    Arris SB6190 cable modem,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Lumia 1520 phone
Posts
17
#16
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.

http://www.eightforums.com/tutorials/2227-create-bootable-usb-dvd-windows-8-iso.html

I tried installing the ISO file on my 4gb file using Rufus and Windows7 Tool but both failed. The iso file is 3.63 and 3.8 on disk and my flash drive only has 3.74.

So.. I put the iso on my old iPod and was able to successfully use the Windows 7 tool to get the iso.

So if I boot my iPod as a flashdrive which was able to successfully have its iso contents on it, I would be able to install W8.1 right?
 

My Computer

System One

  • OS
    Windows 7 Home Premium

Brink

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mvp
Posts
23,104
#17
Penny,

I've never tried booting from an iPod, but if you are able to, then you should be able to.

If not, then it may be time to get a larger USB flash drive.
 

My Computer

System One

  • OS
    64-bit Windows 10
    Computer type
    PC/Desktop
    System Manufacturer/Model Number
    Custom self built
    CPU
    Intel i7-8700K OC'd to 5 GHz
    Motherboard
    ASUS Maximus X Code Z370
    Memory
    16 GB (8GBx2) G.SKILL TridentZ DDR4 3200 MHz
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    3 x 27" Asus VE278Q
    Screen Resolution
    1920x1080
    Hard Drives
    250GB Samsung 960 EVO M.2,
    256GB OCZ Vector,
    6TB WD Black WD6001FZWX
    8TB WD MyCloudEX2Ultra NAS
    PSU
    OCZ Series Gold OCZZ1000M 1000W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master
    Internet Speed
    300 Mb/s Download and 30 Mb/s Upload
    Browser
    Internet Explorer 11
    Antivirus
    Malwarebyte Anti-Malware Premium
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    Linksys EA9500 router,
    Arris SB6190 cable modem,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Lumia 1520 phone
Posts
17
#18
Ahh.. I see.

Thing is I have like 5 different flash drives and they are all 4gb. Buying a new one seems pointless.

Thanks anyway. If the iPod works, then it works but if it doesn't, I'll borrow a flashdrive somehow I guess.

Thank you for all your help and the tutorials.
 

My Computer

System One

  • OS
    Windows 7 Home Premium

Brink

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Administrator
mvp
Posts
23,104
#19
You're welcome. Please let us know how it went. :)
 

My Computer

System One

  • OS
    64-bit Windows 10
    Computer type
    PC/Desktop
    System Manufacturer/Model Number
    Custom self built
    CPU
    Intel i7-8700K OC'd to 5 GHz
    Motherboard
    ASUS Maximus X Code Z370
    Memory
    16 GB (8GBx2) G.SKILL TridentZ DDR4 3200 MHz
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    3 x 27" Asus VE278Q
    Screen Resolution
    1920x1080
    Hard Drives
    250GB Samsung 960 EVO M.2,
    256GB OCZ Vector,
    6TB WD Black WD6001FZWX
    8TB WD MyCloudEX2Ultra NAS
    PSU
    OCZ Series Gold OCZZ1000M 1000W
    Case
    Thermaltake Core P3
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master
    Internet Speed
    300 Mb/s Download and 30 Mb/s Upload
    Browser
    Internet Explorer 11
    Antivirus
    Malwarebyte Anti-Malware Premium
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    Linksys EA9500 router,
    Arris SB6190 cable modem,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Lumia 1520 phone

PrplHaz4

New Member
Posts
4
#20
I'm seeing inconsistent results when checking (on a clean windows 8.1 install)
Option 1: No EFI partition on boot disk (I actually have two bootable drives - the other has an EFI partition, but I don't boot to it)
Option 2: BIOS Mode: UEFI
Option 3: Detected boot environment: EFI

Any idea what would be causing this, or does the article need to be udpated? I'm wondering if I remove the 2nd bootable drive (which I plan to do), will it start reporting Legacy boot? For boot selection, I get what seems to be the UEFI boot screen (with mouse support...etc).
 

My Computer

System One

  • OS
    Windows 8.1