When booting with a WIndows 10 iso it can boot when the computer BIOS settings are:
UEFI without CSM
UEFI with CSM
BIOS / Legacy
Without going into the BIOS what command if any can be run to see whether the computer is or is not using CSM?
Thank you, Brink! I hope this great tutorial is the best place to post this question, rather than in Installation and Upgrade.
In preparing to create my media for my Windows 7 to Windows 19 upgrade, I am not clear on what I should be saying my system is – Legacy Bios or otherwise.
I have an Asus P8P67, which has an "EFI BIOS".
Windows Boot Loader path is \Windows\system32\winload.exe, which I understand is BIOS not UEFI.
The System Information lists BIOS Version/Date as American Megatrends Inc.1702, 17/05/2011 with no mention of Legacy, BIOS or UEFI. Below that line it says SMBIOS Version 2.6
From an old forum post Asus P8P67 Pro and UEFI booting | [H]ard|Forum it sounds like the option of UEFI is only presented installing from the Windows 7 x64 disc and a GPT booting drive is available. I have not explored this since I got my computer nearly 10 years ago and feel a bit slow for not being more curious.
My questions now are:
- for upgrading should I use Legacy BIOS settings when I make my bootable USB in Rufus?
and
-if I should ever subsequently (or in the near future if upgrading doesn't work) do a fresh install of Windows 10, should I then try to change to UEFI at the time of install?
Hello @EdieShack,
It appears to be "Legacy BIOS" from your bcdedit results.
If you like, you can use Rufus to create a bootable Windows 10 installation USB that supports both UEFI and Legacy BIOS to have your bases covered.
Create Bootable USB Flash Drive to Install Windows 10
Another powershell method is:
$env:firmware_type
Hello pmkochie, and welcome to Ten Forums.
Thank you. I added this as option 5 to the tutorial.
Check if Windows 10 is using UEFI or Legacy BIOS
OK, this is driving me nuts. How can I use a CMD Prompt to output either of the following please . . .
The Motherboards Firmware is: Legacy
The Motherboards Firmware is: UEFI
Everything I have tried has put the result on the line below the "The Motherboards Firmware is: ". I just can't get it on the same line.
I have tried loads of different ways, including . . .
Code:if (Test-Path $env:windir\Panther\setupact.log) {(Select-String 'Detected boot environment' -Path "$env:windir\Panther\setupact.log" -AllMatches).line -replace '.*:\s+'} else {if (Test-Path HKLM:\System\CurrentControlSet\control\SecureBoot\State) {"UEFI"} else {"BIOS"}}Code:PowerShell.exe -Command "Write-Host 'The Motherboards Firmware is:' Write-Host if (Test-Path $env:windir\Panther\setupact.log) {(Select-String 'Detected boot environment' -Path "$env:windir\Panther\setupact.log" -AllMatches).line -replace '.*:\s+'} else {if (Test-Path HKLM:\System\CurrentControlSet\control\SecureBoot\State) {"UEFI"} else {"BIOS"}}"'Code:echo The Motherboards Firmware is: & PowerShell.exe -Command "& {if (Test-Path $env:windir\Panther\setupact.log) {(Select-String 'Detected boot environment' -Path "$env:windir\Panther\setupact.log" -AllMatches).line -replace '.*:\s+'} else {if (Test-Path HKLM:\System\CurrentControlSet\control\SecureBoot\State) {"UEFI"} else {"BIOS"}}}
Thanks.
Quote
