bill - 1:00 am on Mar 27, 2008 (gmt 0)
The hour long install I mentioned didn't include download time. I downloaded SP1 from the MSDN network back in February. I was just referring to the install time.
What I did notice was that after the update was "installed" the machine wanted to reboot three times to complete the installation.
If I recall the setup dialogs tell you about the multiple restarts during the install. That's nothing to be concerned about.
I believe that machines that come with Vista installed will breeze through this update.
I wonder what the breakdown is? I've had no upgrade problems with SP1, but all machines had a clean install of Vista to begin with. None of them were upgraded from XP.