Brandon LeBlanc: Today Nick announced the availability of the release candidate for Windows Vista SP1. I had a chance to get the RC build of Windows Vista SP1 installed a few days ago. I decided to roll the RC out on all of my PCs which showcase a variety of device types and scenarios

In installing the RC on my PCs, I did a combination of using the standalone installer and Windows Update. Before proceeding to install the SP1 RC bits, I first needed to uninstall the SP1 beta bits first. Users looking to install the Windows Vista SP1 RC will need to uninstall any previous version of SP1 prior to the installation of the RC from either Windows Update or the standalone installer. With Windows Update, once SP1 was downloaded, a new series of screens telling me about SP1 appeared. The same series of dialog screens seen in the standalone installer is now launched when installing Windows Vista SP1 via Windows Update. This will be really helpful to the user in installing Windows Vista SP1. Previously with the beta, there was no guidance from Windows Update in installing Windows Vista SP1 like there was with the standalone installer. The ability to catch issues like insufficient disk space or PC not on battery power has been implemented earlier in the installation process - with a simple more useful error message to the user. In installing Windows Vista SP1 over Windows Update, a series of pre-requisites must first be installed before SP1. For the RC, these pre-requisites presented themselves to me in proceeding to install SP1 from Windows Update. However, before the final version of Windows Vista SP1 is released, it is likely these pre-requisites will be installed prior to SP1's release. If you have Windows Update configured for Automatic Update - it is likely these pre-requisites will be installed automatically at night.