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Scripts i (ab)use

Config NIC as DHCP Client

$IPType = "IPv4"
$adapter = Get-NetAdapter | ? {$_.Status -eq "up"}
$interface = $adapter | Get-NetIPInterface -AddressFamily $IPType

If ($interface.Dhcp -eq "Disabled") {
    # Remove existing gateway
    If (($interface | Get-NetIPConfiguration).Ipv4DefaultGateway) {
        $interface | Remove-NetRoute -Confirm:$false
    }

    # Enable DHCP
    $interface | Set-NetIPInterface -DHCP Enabled

    # Configure the  DNS Servers automatically
    $interface | Set-DnsClientServerAddress -ResetServerAddresses
}