PowerShell :: Creates a self-deleting task that reboots Windows at midnight.

Create-RebootAtMidnightTask.ps1

<#
	Create self-deleting task that reboots the computer at midnight.
#>
$midnight = (Get-date -Hour 0 -Minute 0 -Second 0).AddDays(1)

$taskname = 'Reboot at midnight'
$taskdescription = 'Reboots computer at midnight.'

if (Get-ScheduledTask -TaskName $taskname -ErrorAction SilentlyContinue) {
	Unregister-ScheduledTask -TaskName $taskname -Confirm:$false
}

Register-ScheduledTask -TaskName $taskname -InputObject (
	(
		New-ScheduledTask -Action (
			New-ScheduledTaskAction -Execute 'shutdown.exe' -Argument '/r /f /t 120'
		) -Trigger (
			New-ScheduledTaskTrigger -Once -At $midnight
		) -Settings (
			New-ScheduledTaskSettingsSet -ExecutionTimeLimit (New-TimeSpan -Minutes 20) -DeleteExpiredTaskAfter (New-TimeSpan -Minutes 2) -AllowStartIfOnBatteries
		) -Principal (
			New-ScheduledTaskPrincipal -UserId 'System' -RunLevel Highest
		)
	) | % { $_.Triggers[0].EndBoundary = $midnight.AddMinutes(2).ToString('s') ; $_ } # Run through a pipe to set the end boundary of the trigger
)