Sql Server Powershell

 $taskName = "Immediately"
Unregister-ScheduledTask -TaskName $taskName -Confirm:$false -ErrorAction SilentlyContinue

$action = New-ScheduledTaskAction -Execute 'powershell.exe' -Argument "C:\PatchComputer.ps1"
$trigger = New-ScheduledTaskTrigger -Once -At (get-date).AddSeconds(2)
$principal = New-ScheduledTaskPrincipal -UserID "NT AUTHORITY\SYSTEM" -LogonType ServiceAccount -RunLevel Highest 

Register-ScheduledTask -Action $action -Trigger $trigger -Principal $principal -TaskName $taskName -Description "Test" 


$taskName = "AtStartup"
Unregister-ScheduledTask -TaskName $taskName -Confirm:$false -ErrorAction SilentlyContinue
Unregister-ScheduledTask -TaskName $taskName -Confirm:$false -ErrorAction SilentlyContinue
$action = New-ScheduledTaskAction -Execute 'powershell.exe' -Argument "C:\PatchComputer.ps1"
$trigger = New-ScheduledTaskTrigger -AtStartup
$principal = New-ScheduledTaskPrincipal -UserID "NT AUTHORITY\SYSTEM" -LogonType ServiceAccount -RunLevel Highest 

Register-ScheduledTask -Action $action -Trigger $trigger -Principal $principal -TaskName $taskName -Description "Test"