if (!([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
    Start-Process PowerShell -Verb RunAs "-NoProfile -ExecutionPolicy Bypass -Command `"cd '$pwd'; & '$PSCommandPath';`"";
    exit;
}
Get-NetAdapter

$ifIndex = read-host "Interface Index:"
$NetworkInput = read-host "Network (First 3 Octets):"
$HostInput = Read-Host "Host address (Last Octet):"
$IPAddress = $NetworkInput +"."+$HostInput
$SubnetmaskInput = read-host "Subnet Mask Or Last Octet(/24):"
if($SubnetmaskInput -eq '') {$SubnetmaskInput= "24"}
$DefaultGatewayInput = read-host "Default Gateway (Last Octet):"
$DefaultGateway = $NetworkInput +"."+$DefaultGatewayInput

Switch ($SubnetmaskInput)
{
24 {$Mask = $SubnetmaskInput}
32 {$Mask = $SubnetmaskInput}
30 {$Mask = $SubnetmaskInput}
29 {$Mask = $SubnetmaskInput}
0 {$Mask = 24}
255 {$Mask = 32}
252 {$Mask = 30}
248 {$Mask = 29}

Default {'Invalid Subnet Mask'}
}

#ipconfig /all
New-NetIPAddress -InterfaceIndex $ifIndex -IPAddress $IPAddress -PrefixLength $Mask -DefaultGateway $DefaultGateway
#ipconfig /all
pause
Remove-NetIPAddress -IPAddress $IPAddress -DefaultGateway $DefaultGateway
Set-NetIPInterface -InterfaceIndex $ifIndex -Dhcp Enabled
#ipconfig /all
ipconfig /renew
pause