Service Pack 1 beats all previous records of the number of restarts a Service Pack requires. Normally the number of restarts to install a Service Pack is limited to just one (1) restart but with Vista this number is up to almost ten (10) restarts. First, you have to install a number of hot fixes one at a time just to be able to install SP1 as it requires certain fixes to make sure that nothing breaks during SP1. Installing SP1 itself also requires some five restarts or something like that before the installation is finished. As the SP1 is still in beta one could always hope that this number of required restarts would decrease as we reach the final version of SP1 but Microsoft has declined this. But prior to releasing SP1 Microsoft will start shipping the pre-requisite updates via Automatic Updates so that they are installed well in time before SP1 start shipping.