Kann mir mal sagen warum das Skript nicht mehr funktioniert?

Ausnahme beim Aufrufen von "GetStringValue": "Der Parameter ist ungültig. "  
In C:\Identifziere_IE_Version_LDAP.ps1:21 Zeichen:5
+     $iePath = ($regProv.GetStringValue($HKLM, $IESubKeyName, "")).sValue  
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) , MethodInvocationException
    + FullyQualifiedErrorId : WMIMethodException

          
  function Get-IEVersion {            
    param(            
      [String] $computerName            
    )            
    # Create custom object.            
    $outputObject = "" | Select-Object `  
      @{Name="ComputerName"; Expression={$computerName}},              
      @{Name="Path"; Expression={}},              
      @{Name="Version"; Expression={}},              
      @{Name="Error"; Expression={}}              
    # Step 1: Read App Paths subkey to get path of iexplore.exe.            
    try {            
      $regProv = [WMIClass] "\\$computerName\root\default:StdRegProv"              
    }            
    catch [System.Management.Automation.RuntimeException] {            
      # Update custom object with error message and return it.            
      $outputObject.Error = $_.Exception.InnerException.InnerException.Message            
      return $outputObject            
    }            
    $iePath = ($regProv.GetStringValue($HKLM, $IESubKeyName, "")).sValue              
    if ( -not $iePath ) {            
      # Update custom object with error message and return it.            
      return $outputObject            
    }            
    $outputObject.Path = $iePath            
    # Replace '\' with '\\' when specifying CIM_DataFile key path.              
    $iePath = $iePath -replace '\\', '\\'              
    # Step 2: Get the CIM_DataFile instance of iexplore.exe.            
    try {            
      $dataFile = [WMI] "\\$computerName\root\CIMV2:CIM_DataFile.Name='$iePath'"              
      # Update custom object with IE file version.            
      $outputObject.Version = $dataFile.Version            
    }            
    catch [System.Management.Automation.RuntimeException] {            
      # Update custom object with error message.            
      $outputObject.Error = $_.Exception.InnerException.InnerException.Message            
    }            
    # Return the custom object.            
    return $outputObject            
  }            

$computers= Get-ADComputer -Filter "Name -like 'server*'" -Properties * | Where-Object OperatingSystem -Like '*server*' | Select-Object -expandProperty Name  
#$computers= Get-ADComputer -Filter "Name -like '*'" -Properties * | Where-Object OperatingSystem -Like '*Server*' | Select-Object -expandProperty Name  
$temp = $null

foreach ( $computer in $Computers ) {            
    #Get-IEVersion $computer
    $temp +=,(Get-IEVersion $computer)

    } 

$temp | Out-GridView
$path = $temp | Export-Csv -Delimiter ';' -NoTypeInformation -Force -Path "W:\IEVersionen1.csv"