Although I'm late to the party in reviewing Windows Vista SP1, it's becoming widely available as I write this, so now is as good a time as any for my review. Rather than try to cover every improvement in SP1, I'm going to cover my particular experiences. Read my review.
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Windows Vista SP1 review 
Curious about the Windows Server 2008 setup process? Our Windows Server 2008 setup screenshot gallery shows you what it looks like, step-by-step.