Update-MACAddress.ps1

$searchterm = 'intel'
$newmac     = 'A0B1C2D3E4F5'

$path = 'HKLM:\SYSTEM\CurrentControlSet\Control\Class\{4d36e972-e325-11ce-bfc1-08002be10318}'

Push-Location $path

$nic = Get-ChildItem -ea SilentlyContinue | Get-ItemProperty | where driverdesc -like "*$searchterm*"

switch($nic.pspath.count)
{

    1 {
        Write-host Setting MAC address on adapter $nic.DriverDesc to $newmac -ForegroundColor Green
        set-itemproperty -Path $nic.PSPath -Name NetworkAddress -Value $newmac -Type String
        if((Get-ItemProperty -Path $nic.PSPath -Name NetworkAddress).NetworkAddress -eq $newmac)
        {
            write-host MAC address $newmac has been set on $nic.name successfully. -ForegroundColor Cyan
        }
        else
        {
            write-host Setting MAC address $newmac on $nic.name failed -ForegroundColor Red
        }
    }

    {$_ -gt 1} {
        Write-warning "More than one NIC matched `'$searchterm`' `nPlease refine the search term."
    }

    default {Write-Host No NIC matched $searchterm -ForegroundColor DarkCyan}
}

Pop-Location