public/Update-AWSWindowsHelperAMI.ps1
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function Update-AWSWindowsHelperAMI{ Param( [Parameter(Mandatory=$true)] $Region, [Parameter(Mandatory=$true)] $InstanceID ) $UserData = { $TaskName = "AMI Windows Patching" try{ $STPrin = New-ScheduledTaskPrincipal -UserId "SYSTEM" -LogonType ServiceAccount $STTri1 = New-ScheduledTaskTrigger -AtStartup $STTri2 = New-ScheduledTaskTrigger -Once -At $(Get-Date) -RepetitionInterval "00:01:00" -RepetitionDuration $([TimeSpan]::MaxValue) $STAct = New-ScheduledTaskAction -Execute "PowerShell.exe" ` -Argument $('-executionpolicy Bypass -NonInteractive -c "powershell -executionpolicy Bypass -NonInteractive -c '+$($MyInvocation.MyCommand.Definition)+' -verbose >> C:\PatchingScheduledTask.log 2>&1"') Register-ScheduledTask -Principal $STPrin -Trigger @($STTri1,$STTri2) -TaskName $TaskName -Action $STAct }catch{ Write-Error $_.exception.message } # Install PSWindowsUpdate using Chocolatey Set-ExecutionPolicy Unrestricted -Force iex ((New-Object System.Net.WebClient).DownloadString('https://chocolatey.org/install.ps1')) choco source add -n=chocolatey -s="https://chocolatey.org/api/v2/" -y choco install pswindowsupdate -y Install-PackageProvider Nuget -Force Install-Module PSWindowsUpdate -Force if(Get-WUList){ Write-Host "Updates required, installing" Get-WUInstall -AcceptAll -AutoReboot | Out-File C:\PSWindowsUpdate.log }else{ Get-ScheduledTask -TaskName $TaskName | Unregister-ScheduledTask -Confirm:$false Write-Host "No updates needed, stopping computer" Stop-Computer -Force } } Send-SSMCommand -DocumentName "AWS-RunPowerShellScript" -Parameter @{commands=[string]$UserData} -InstanceId $InstanceID -Region $Region Write-Verbose "Executed SSM command to update Windows instance and shutdown upon completion" } |