Windows Update PowerShell Remoting

Question

I am working on a script to do Windows Updates on a remote machine. I am using the runspace and powershell objects. I can query and recieve the list of updates, but as I go to download and install them I can an error which indicates that these methods cannot be run from remote computers. Should the object creation and everything be happening on the remote computer? I thought this was the whole idea of the remoting. Am I doing something wrong?

Answer 1

This script works great but I would like to make a suggestion.
Add $VerbosePreference = "Continue" to the top and then change all Write-Host with Write-Progress.  It has the same effect except instead of saying that it is downloading an update it is giving you a progress bar as well.  Updated script below. 
$VerbosePreference = "Continue"
$DebugPreference = "Stop"
function Get-WIAStatusValue($value)
   switch -exact ($value)
      0   {"NotStarted"}
      1   {"InProgress"}
      2   {"Succeeded"}
      3   {"SucceededWithErrors"}
      4   {"Failed"}
      5   {"Aborted"}
$needsReboot = $false
$UpdateSession = New-Object -ComObject Microsoft.Update.Session
$UpdateSearcher = $UpdateSession.CreateUpdateSearcher()
Write-Progress " - Searching for Updates"
$SearchResult = $UpdateSearcher.Search("IsAssigned=1 and IsHidden=0 and IsInstalled=0")
Write-Verbose " - Found [$($SearchResult.Updates.count)] Updates to Download and install"
foreach($Update in $SearchResult.Updates)
   # Add Update to Collection
   $UpdatesCollection = New-Object -ComObject Microsoft.Update.UpdateColl
   if ( $Update.EulaAccepted -eq 0 ) { $Update.AcceptEula() }
   $UpdatesCollection.Add($Update) | out-null
   # Download
   Write-Progress " + Downloading Update $($Update.Title)"
   $UpdatesDownloader = $UpdateSession.CreateUpdateDownloader()
   $UpdatesDownloader.Updates = $UpdatesCollection
   $DownloadResult = $UpdatesDownloader.Download()
   $Message = "   - Download {0}" -f (Get-WIAStatusValue $DownloadResult.ResultCode)
   Write-Verbose $message   
   # Install
   Write-Progress "   - Installing Update"
   $UpdatesInstaller = $UpdateSession.CreateUpdateInstaller()
   $UpdatesInstaller.Updates = $UpdatesCollection
   $InstallResult = $UpdatesInstaller.Install()
   $Message = "   - Install {0}" -f (Get-WIAStatusValue $DownloadResult.ResultCode)
   Write-Verbose $message
   $needsReboot = $installResult.rebootRequired   
if($needsReboot)
    Write-Debug "Restarting Computer please close all open apps"
    restart-computer