Invoke-CommandAsSystem.ps1
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.SYNOPSIS Run PowerShell commands under system context. .EXAMPLE PS C:\>Invoke-CommandAsSystem { [System.Security.Principal.WindowsIdentity]::GetCurrent().Name } Run the ScriptBlock under the system context. .INPUTS System.Management.Automation.ScriptBlock #> function Invoke-CommandAsSystem { [CmdletBinding()] param ( # [Parameter(Mandatory=$true, ValueFromPipeline=$true, Position=1)] [ScriptBlock] $ScriptBlock, # [Parameter(Mandatory=$false, Position=2)] [string[]] $ArgumentList ) [guid] $GUID = New-Guid try { ## Register ScheduleJob if ($ArgumentList) { $ScheduledJob = Register-ScheduledJob -Name $GUID -ScheduledJobOption (New-ScheduledJobOption -RunElevated) -ScriptBlock $ScriptBlock -ArgumentList $ArgumentList -ErrorAction Stop } else { $ScheduledJob = Register-ScheduledJob -Name $GUID -ScheduledJobOption (New-ScheduledJobOption -RunElevated) -ScriptBlock $ScriptBlock -ErrorAction Stop } try { ## Register ScheduledTask for ScheduledJob $ScheduledTask = Register-ScheduledTask -TaskName $GUID -Action (New-ScheduledTaskAction -Execute $ScheduledJob.PSExecutionPath -Argument $ScheduledJob.PSExecutionArgs) -Principal (New-ScheduledTaskPrincipal -UserID 'NT AUTHORITY\SYSTEM' -LogonType ServiceAccount -RunLevel Highest) -ErrorAction Stop ## Execute ScheduledTask Job to Run ScheduledJob Job $ScheduledTask | Start-ScheduledTask -AsJob -ErrorAction Stop | Wait-Job | Remove-Job -Force -Confirm:$False ## Wait for ScheduledTask to finish While (($ScheduledTask | Get-ScheduledTaskInfo).LastTaskResult -eq 267009) {Start-Sleep -Milliseconds 150} ## Find ScheduledJob and get the result $Job = Get-Job -Name $GUID -ErrorAction SilentlyContinue | Wait-Job $Result = $Job | Receive-Job -Wait -AutoRemoveJob } finally { ## Unregister ScheduledTask for ScheduledJob $ScheduledTask | Unregister-ScheduledTask -Confirm:$false } } finally { ## Unregister ScheduleJob $ScheduledJob | Unregister-ScheduledJob -Force -Confirm:$False } return $Result } |