Run Powershell in remote computers

Question

Hi All,
I want to run Powershell function in a remote computers in AD 
Here are the steps that i take but i got some errors 
* I Import the ADComputer from Active directory 
Get-ADComputer -Filter * -Property * | Select-Object Name,OperatingSystem,OperatingSystemServicePack,OperatingSystemVersion | Export-CSV C:\Users\Administrator\Documents\AllWindows.csv -NoTypeInformation -Encoding UTF8
*Then I create a script to run the function I got from net 
$FilePath = "C:\Users\Administrator\Documents\AllWindows.csv"$ComputerName = Import-Csv -Path $FilePath -Delimiter ","foreach($CompName in $ComputerName){Invoke-Command -ComputerName $PSItem.Name -ScriptBlock ${function:Get-WindowsKey}}
But when i run above gives the following error
Invoke-Command : Cannot validate argument on parameter 'ComputerName'. The argument is null or empty. Provide an argument that is not null or empty, and then try the command again.
At C:\Users\Administrator\Desktop\GetWinKey.ps1:9 char:30
+ Invoke-Command -ComputerName $PSItem.Name -ScriptBlock ${function:Get-WindowsKey ...
+                              ~~~~~~~~~~~~
    + CategoryInfo          : InvalidData: (:) [Invoke-Command], ParameterBindingValidationException
    + FullyQualifiedErrorId : ParameterArgumentValidationError,Microsoft.PowerShell.Commands.InvokeCommandCommand
Following is the function i run to get windows keys
function Get-WindowsKey {    ## function to retrieve the Windows Product Key from any PC    param ($targets = ".")    $hklm = 2147483650    $regPath = "Software\Microsoft\Windows NT\CurrentVersion"    $regValue = "DigitalProductId"    Foreach ($target in $targets) {        $productKey = $null        $win32os = $null        $wmi = [WMIClass]"\\$target\root\default:stdRegProv"        $data = $wmi.GetBinaryValue($hklm,$regPath,$regValue)        $binArray = ($data.uValue)[52..66]        $charsArray = "B","C","D","F","G","H","J","K","M","P","Q","R","T","V","W","X","Y","2","3","4","6","7","8","9"        ## decrypt base24 encoded binary data        For ($i = 24; $i -ge 0; $i--) {            $k = 0            For ($j = 14; $j -ge 0; $j--) {                $k = $k * 256 -bxor $binArray[$j]                $binArray[$j] = [math]::truncate($k / 24)                $k = $k % 24            }            $productKey = $charsArray[$k] + $productKey            If (($i % 5 -eq 0) -and ($i -ne 0)) {                $productKey = "-" + $productKey            }        }        $win32os = Get-WmiObject Win32_OperatingSystem -computer $target        $obj = New-Object Object        $obj | Add-Member Noteproperty Computer -value $target        $obj | Add-Member Noteproperty Caption -value $win32os.Caption        $obj | Add-Member Noteproperty CSDVersion -value $win32os.CSDVersion        $obj | Add-Member Noteproperty OSArch -value $win32os.OSArchitecture        $obj | Add-Member Noteproperty BuildNumber -value $win32os.BuildNumber        $obj | Add-Member Noteproperty RegisteredTo -value $win32os.RegisteredUser        $obj | Add-Member Noteproperty ProductID -value $win32os.SerialNumber        $obj | Add-Member Noteproperty ProductKey -value $productkey        $obj    }} 
What i want is to run the Get-WindowsKey function in all AD computers 
Thanks

Answer 1

The error tells you what is wrong, try changing this -
Invoke-Command -ComputerName $PSItem.Name to thisInvoke-Command -Computername $Compname.Name
You need to use the variable you declare in the foreach loop.