er, wait, are you asking about restarting the machine and not shutting it down?  If thats what your asking, I feel really stupid right now  
 
As for a problem with the restart, that could also be a power issue, though I really don't think it is.  I would check the knoweldge database some more and listen for smart people to respond to you from here instead of morons like me 

  sorry about that, I just gotta learn to read better.  Peace
-b