I am trying to update my iphone 4 from ios5.1 to ios6 and i have it connected to computer and i have opened itunes. where do i go from here. there is not enought memory to update wirelessly and apple store told me to do with itumes. it does not seem like my computer is recognizing iphone. it opened wizard to look for software and could not find anything. I am using windows XP on my computer.