well , I launch windows update, chose the fix I want to install. Windows says it has to reboot because there are some files that can't be copied. When I reboot, it says "installing updates 1.... 15%", then reboot occurs. At system startup, another % occur "configuring" (so yes to your question) it goes till 15% too and then says "error on update, reverting changes"
i hope I answered your question.