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 It's no secret that there's a leaked beta of Vista SP1 floating 
around, but no-one yet has really taken the time to analyse it in 
detail to find out what it really does. I made it my mission this 
weekend to trawl through the registry and file changes in SP1 to find 
out exactly what SP1 does.
First up, I can say that there is a very noticeable performance 
increase. It is obvious that since Microsoft released Vista to 
manufacturing, it has been optimising the code ever since. There’s 
far less hard drive thrashing and in general the system seems much 
smoother and more responsive. 
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