ContinueScriptAfterReboot.ps1

if (-Not (Test-Path "C:\Temp\tik.txt" -PathType leaf))
{
    New-Item "C:\Temp\" -Name "tik.txt" -ItemType "file"
    $RunOnceKey = "HKLM:\Software\Microsoft\Windows\CurrentVersion\RunOnce"
    $ScriptPath = $MyInvocation.MyCommand.Definition
    $ScriptExecPath = "C:\Windows\System32\WindowsPowerShell\v1.0\Powershell.exe -File "
    $ScriptFullExecPath = $ScriptExecPath + $ScriptPath
    Set-ItemProperty $RunOnceKey "NextRun" $ScriptFullExecPath
    #Do first part of stuff here
    Restart-Computer
}
else
{
    Remove-Item "C:\Temp\tik.txt"