This looks like a way to boot to a "clean" desktop (no Explorer window visible)
Sourced from http://superuser.com/a/433444
Create an ahk text file with the two lines below, compile it with Autohotkey and add the compiled application as a scheduled task using the method above.
WinWaitActive Start menu ahk_class ImmersiveLauncher
I don't have access to Win8 right now, so any AHK users please test to let us know if this works!
Keep Up with TechRepublic