CODEWITHSUNDEEP
powershell
Daniel
Daniel

Reputation: 590

How to Check Device Boot Mode (UEFI or Legacy)?

How can I use Powershell to determine if a device is running in UEFI or Legacy boot mode and return a simple string that says "UEFI" or "Legacy"?

Upvotes: 2

Views: 7561

Answers (2)

Mace
Mace

Reputation: 21

Run that on Powershell without elevation:

$env:firmware_type

Returns "UEFI" or "Legacy"

Upvotes: 2

Jim
Jim

Reputation: 18853

The below is for elevated, there might be ways to get it non-elevated, but you didn't specify if that was a requirement so here it is.

Run this in an elevated PowerShell:

$BootMode = bcdedit | Select-String "path.*efi"
if ($null -eq $BootMode) {
    # I think non-uefi is \Windows\System32\winload.exe
    $BootMode = "Legacy"
}else {
    # UEFI is: 
    #path                    \EFI\MICROSOFT\BOOT\BOOTMGFW.EFI
    #path                    \Windows\system32\winload.efi
    $BootMode = "UEFI"
}

Write-Host "Computer is running in $BootMode boot mode."

If it has .efi in the path, its UEFI mode. If it shows .exe, it's the legacy boot if my memory serves me right.

Upvotes: 7

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