Scripting Games 2012 Advanced Event 8

Advanced Event 8 :

<#
.DESCRIPTION
    This script can enable and (or) disable wireless or ethernet adapter to prevent bridging on laptop computers.
.LINK
    http://blogs.technet.com/b/heyscriptingguy/archive/2012/04/11/the-2012-scripting-games-advanced-event-8-enable-network-adapters.aspx
#>

function get-netadapter
{
  param ([string]$nettype= "%", $isEnabled=$null)
    if ($isenabled -eq $null)
    {
      $filter ="name like '$nettype'"
    }
    else
    {
      $filter ="name like '$nettype' and netenabled=$isenabled"
    }   
   return Get-WmiObject win32_networkadapter -Filter $filter
}

function enableadapter
{
  param ($enable=$true, $neta, $prev=$false)
    #enable adapters
    if ($enable)
    {
      if ($neta.count -gt 1)
      {
     
         foreach ($adapter in $neta)
         {
            do
            {
                $choice = Read-Host $adapter.description  " Enable Yes/No ?"
            }
            until ($choice -eq "yes" -or $choice -eq "no")
           
             If ($Choice -eq "yes")
             {
                if (!($prev))
                {
                    $adapter.enable()
                }
                else
                {
                    # for pre-vista os, even though netsh is working on post vista oss,
                    #it is fun using new method for these oss .enable() or .disable()
                    netsh interface set interface "$($adapter.netconnectionID)" ENABLED
                }
               
                return
             }   
          }
       }
       else
       {
          if (!($prev))
          {
             $neta.enable()
          }
          else
          {
                   
              netsh interface set interface "$($neta.netconnectionID)" ENABLED
           }
       }
   
    }
    #disable adpaters
    else
    {
      foreach ($adapter in $neta)
      {
     
                if (!($prev))
                {
                    $adapter.disable()
                }
                else
                {
                    netsh interface set interface "$($adapter.netconnectionID)" DISABLED
                }
      }
     }
}

    $identity  = [System.Security.Principal.WindowsIdentity]::GetCurrent()
    $principal = New-Object System.Security.Principal.WindowsPrincipal( $identity )
   
        if (!($principal.IsInRole( [System.Security.Principal.WindowsBuiltInRole]::Administrator )))
        {
            write-host "Warning: You're not running this script using elevated shell. You will not be able to run this script without administrative permission."
            exit
   
        }
       
   $os = Get-WmiObject Win32_OperatingSystem
    if ($os.version -match "5.")
    {
        $prevista=$true
    }
    else
    {
        $prevista=$false
    }
   
    $comp = Get-WmiObject win32_ComputerSystem
    #It is a laptop   
     if ($comp.PCSystemType -eq 2)
     {
         #check for enabled wireless and ethernet adapters
         $wless=@()
         $wless = @(get-netadapter "%wireless%" $true)
         $ether=@()
         $ether = @(get-netadapter "%ethernet%" $True)
            #wireless adapters not enabled and ethernet adpaters enabled
            if ($wless.Count -eq 0 -and $ether.Count -gt 0)
            { 
                #disable ethernet adapters
                enableadapter $false $ether $prevista
                #enable wireless adapter
                enableadapter $True (get-netadapter "%wireless%" $false) $prevista
   
            }
            #wireless adapter(s) enabled and ethernet adpaters disabled
            elseif ($wless.Count -gt 0 -and $ether.Count -eq 0)
            {
               #disable wireless adapters
                enableadapter $false $wless $prevista
                #enable ethernet adapter
                enableadapter $True (get-netadapter "%ethernet%" $false) $prevista
            }
            # no ethernet or wireless enabled
            elseif ($wless.Count -eq 0 -and $ether.Count -eq 0)
            {
                do
                {
                    $choice = Read-Host "Ethernet and Wireless adapters are disabled.Enable Wireless adapter Yes/No ?"
                }
                until ($choice -eq "yes" -or $choice -eq "no")
           
                If  ($choice -eq "yes")
                {
                    Write-Host "Enabling wireless adapters ..."
                    enableadapter $True (get-netadapter "%wireless%" $false) $prevista
                }
                else
                {
                    Write-Host "Enabling ethernet adapters ..."
                    enableadapter $True (get-netadapter "%ethernet%" $false) $prevista
                }
      
            }
            # ethernet and wireless enabled
            elseif ($wless.Count -gt 0 -and $ether.Count -gt 0)
            {
                do
                {
                    $choice = Read-Host "Ethernet and Wireless adapters are enabled.Disable Wireless adapter Yes/No ?"
                }
                until ($choice -eq "yes" -or $choice -eq "no")
           
                If  ($choice -eq "yes")
                {
                    Write-Host "Disabling wireless adapters ..."
                    enableadapter $false (get-netadapter "%wireless%" $true) $prevista
                }
                else
                {
                    Write-Host "Disabling ethernet adapters ..."
                    enableadapter $false (get-netadapter "%ethernet%" $true) $prevista
                }
      
            }
        }
        else
        {
            Write-Host "This script is only for laptops !"
        }