Can anyone tell me how to create a scheduled task using powershell that runs as the local system or local service?
Everything works great except the call to ITaskFolder.RegisterTaskDefinition().
If I pass in $null, or "", than the call bombs saying invalid username or password. Any thoughts"
$Rootfolder.RegisterTaskDefinition("Test", $Taskdef, 6, "LOCAL SERVICE", "", 3)
I think you would need to use "nt authority\localservice" as the user name.
Kindness,
Dan
For those who can use PowerShell 3.0 on Windows 8 or Windows Server 2012, new cmdlets will let you do it in a simple way when registering your scheduled task with the cmdlet Register-ScheduledTask and as argument -User "System"
Here is a scheduled task created entirely with PS, its purpose is to restart a service My Service, using the SYSTEM account, 3 minutes after the system has started:
$taskname = "Restart My Service"
$taskdescription = "Restart My Service after startup"
$action = New-ScheduledTaskAction -Execute 'Powershell.exe' `
-Argument '-NoProfile -WindowStyle Hidden -command "& Restart-Service -displayname \"My Service\""'
$trigger = New-ScheduledTaskTrigger -AtStartup -RandomDelay (New-TimeSpan -minutes 3)
$settings = New-ScheduledTaskSettingsSet -ExecutionTimeLimit (New-TimeSpan -Minutes 2) -RestartCount 3 -RestartInterval (New-TimeSpan -Minutes 1)
Register-ScheduledTask -Action $action -Trigger $trigger -TaskName $taskname -Description $taskdescription -Settings $settings -User "System"
NB: you will need to run powershell as an administrator for that script.
This code snippet will use the PowerShellPack's Task Scheduler module to schedule a task to run as SYSTEM immediately:
New-Task |
ForEach-Object {
$_.Principal.Id = "NTAuthority\SYSTEM"
$_.Principal.RunLevel = 1
$_
} |
Add-TaskAction -Script {
"SystemTask" > C:\myTest.txt
} |
Add-TaskTrigger -OnRegistration |
Register-ScheduledTask SystemTask
