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Powershell: Automatically decline ARM64 Updates on WSUS


The PowerShell script below allows you to automatically decline ARM64 updates from Windows 10 into WSUS.

The script can be started manually or by a scheduled task.

The script must be running on the WSUS server.

Works under:

  • Windows 2012 and 2010R2
  • Windows 2016
  [string]$WsusServer = ([]::GetHostByName('localhost')).hostname,
  [bool]$UseSSL = $False,
  [int]$PortNumber = 8530,
  [bool]$TrialRun = $False,
  [bool]$EmailLog = $False,
  [string]$SMTPServer = "smtp.domain.intra",
  [string]$From = "[email protected]",
  [string]$To = "[email protected]",
  [string]$Subject = "WSUS :: Declining ARM Updates"
$script:CurrentErrorActionPreference = $ErrorActionPreference
$ErrorActionPreference = "SilentlyContinue"
$Style = "<Style>BODY{font-size:12px;font-family:verdana,sans-serif;color:navy;font-weight:normal;}" + `
      "TABLE{border-width:1px;cellpadding=10;border-style:solid;border-color:navy;border-collapse:collapse;}" + `
      "TH{font-size:12px;border-width:1px;padding:10px;border-style:solid;border-color:navy;}" + `
If($TrialRun){$Subject += " Trial Run"}
Function SendEmailStatus($From, $To, $Subject, $SMTPServer, $BodyAsHtml, $Body)
{	$SMTPMessage = New-Object System.Net.Mail.MailMessage $From, $To, $Subject, $Body
  $SMTPMessage.IsBodyHTML = $BodyAsHtml
  $SMTPClient = New-Object System.Net.Mail.SMTPClient $SMTPServer
  If($? -eq $False){Write-Warning "$($Error[0].Exception.Message) | $($Error[0].Exception.GetBaseException().Message)"}
  rv SMTPClient
  rv SMTPMessage

#Connect to the WSUS 3.0 interface.
[reflection.assembly]::LoadWithPartialName("Microsoft.UpdateServices.Administration") | out-null
$WsusServerAdminProxy = [Microsoft.UpdateServices.Administration.AdminProxy]::GetUpdateServer($WsusServer,$UseSSL,$PortNumber);
If($? -eq $False)
{	Write-Warning "Something went wrong connecting to the WSUS interface on $WsusServer server: $($Error[0].Exception.Message)"
  {	$Body = ConvertTo-Html -head $Style -Body "Something went wrong connecting to the WSUS interface on $WsusServer server: $($Error[0].Exception.Message)" | Out-String
    $Body = $Body.Replace("<table>`r`n</table>", "")
    SendEmailStatus -From $From -To $To -Subject $Subject -SmtpServer $SmtpServer -BodyAsHtml $True -Body $Body
  $ErrorActionPreference = $script:CurrentErrorActionPreference

$ARM64Updates = $WsusServerAdminProxy.GetUpdates() | ?{-not $_.IsDeclined -and $_.Title -match “ARM64”}
  If($TrialRun -eq $False){$ARM64Updates | %{$_.Decline()}}
  $Table = @{Name="Title";Expression={[string]$_.Title}},`
    @{Name="KB Article";Expression={[string]::join(' | ',$_.KnowledgebaseArticles)}},`
    @{Name="Product Title";Expression={[string]::join(' | ',$_.ProductTitles)}},`
    @{Name="Product Family";Expression={[string]::join(' | ',$_.ProductFamilyTitles)}}
  $ARM64Updates | Select $Table
  {	$Body = $ARM64Updates | Select $Table | ConvertTo-HTML -head $Style
    SendEmailStatus -From $From -To $To -Subject $Subject -SmtpServer $SmtpServer -BodyAsHtml $True -Body $Body
{"No ARM64 Updates found that needed declining. Come back next 'Patch Tuesday' and you may have better luck."}
$ErrorActionPreference = $script:CurrentErrorActionPreference

To enable email notifications:

Pass the $ EmailLog variable to $ True and set the $ SMTPServer, $ From, $ To.

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