Retrieves all current BIOS settings, and lists possible values for each setting

Get-LenovoBiosSetting.ps1

$currentSettings = Get-WmiObject -Class Lenovo_BiosSetting -Namespace root\wmi -Filter 'CurrentSetting != ""' | Select-Object -ExpandProperty CurrentSetting | Sort-Object

$allSettings = @()

foreach ($setting in $currentSettings) {   
    # Check if Lenovo_GetBiosSelections exists. If not, we're running on a newer system that includes returns the possible values
    # as part of the current setting value
    $legacyMethodExists = Get-CimClass Lenovo_GetBiosSelections -Namespace root\wmi -ErrorAction SilentlyContinue -WarningAction SilentlyContinue
    
    if ($legacyMethodExists) {
        $settingName = $setting.split(',')[0]
        $settingValue = $setting.split(',')[1]

        $possibleSelections = (Get-WmiObject -Class Lenovo_GetBiosSelections -Namespace root\wmi).GetBiosSelections($settingName) | Select-Object -ExpandProperty Selections
    } else {
        $settingName = $setting.split(',')[0]
        $settingValue = ($setting.split(';')[0]).split(',')[1]

        $possibleSelections = $setting.split(';')[1]
    }

    $settingHashTable = [ordered]@{'Setting' = $settingName;'Value' = $settingValue;'PossibleSelections' = $possibleSelections}

    $allSettings += New-Object -TypeName psobject -Property $settingHashTable
}

$product = Get-WmiObject Win32_ComputerSystemProduct

$allSettings | Out-GridView -Title "Bios settings for $($product.Vendor) $($product.Version) ($($product.Name))"