From: "Geo." 

"Gregg N"  wrote in message
news:Xns9545C5B44385Egregginvalidinvalid{at}216.144.1.254...

> When it is done taking files from windows update and the local machine it
> ends up with the exact same service pack, bit-for-bit, which can then be
> installed.

Theoretically yes but this is where I'm saying there is a chance that it
doesn't end up with the exact same service pack. It is unlikely it is
checking every bit in 100mb of files. If you have a corrupt file (and I've
seen this happen) going to windows update may not find/fix it but
reinstalling the last full service pack many times will because it just
overwrites all the files with known good copies.

Geo.

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