Tag Archives: Licence

Finding Your Windows 10 OEM Product Key Embedded In Firmware/WMI

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To retrieve the OEM Windows 10 Product Key which is usually stored within a devices WMI repository you can use the following PowerShell command:

(Get-CimInstance -ClassName SoftwareLicensingService).OA3xOriginalProductKey

To retrieve and then install an OEM Windows 10 Product Key, the following PowerShell can be used:

<#
.DESCRIPTION
    Script to activate Windows 10 using OEM licence key
.EXAMPLE
    PowerShell.exe -ExecutionPolicy ByPass -File <ScriptName>.ps1
.NOTES
    Author(s):  Jonathan Conway
    Modified:   08/09/2021
    Version:    1.0
#>

$OemProductKey = (Get-CimInstance -ClassName "SoftwareLicensingService").OA3xOriginalProductKey
$cscript = 'C:\Windows\System32\cscript.exe'

# Install Product Key
return (Start-Process $cscript -ArgumentList "/B C:\Windows\System32\slmgr.vbs -ipk $OemProductKey" -NoNewWindow -PassThru -Wait).ExitCode
return (Start-Process $cscript -ArgumentList "/B C:\Windows\System32\slmgr.vbs -ato" -NoNewWindow -PassThru -Wait).ExitCode

You can also use WMI to accomplish the same things which is demonstrated in the PowerShell script below:

<#
.DESCRIPTION
    Script to activate Windows 10 using OEM licence key
.EXAMPLE
    PowerShell.exe -ExecutionPolicy ByPass -File <ScriptName>.ps1
.NOTES
    Author(s):  Jonathan Conway
    Modified:   10/05/2022
    Version:    1.0
#>

# Variables
$SLS = Get-CimInstance -ClassName "SoftwareLicensingService"
$OemProductKey = (Get-CimInstance -ClassName "SoftwareLicensingService").OA3xOriginalProductKey

# Display and Activate Product Key
Write-Output "$OemProductKey"
$SLS | Invoke-CimMethod -MethodName "InstallProductKey" -Arguments @{ ProductKey = "$OemProductKey" }
$SLS | Invoke-CimMethod -MethodName "RefreshLicenseStatus"

# JC