Hey Rob,
This may or may not be true, however... when I did the install, along with
it came the new Internet Explorer. There was a noticeable slow down of
everything on my system (desktop) and ended up installing a video card with
enough onboard memory so that video would be taxing the system resources.
The addition definitely was an improvement, so I installed one on my wifes
machine as well and that machines performance also improved. The install
didn't seem to affect the laptop in any way, but then I'm guessing it was
designed for a little better video performance. 
Just my thoughts... as I recall, you could "undo" the install, but I could
be wrong on that aspect. I do know that the Internet Explorer can be removed
if your machine and the older version will still be intact.
Hope that helps a bit, good luck!
Dean

> -----Original Message-----
> From: Personal Computer Hardware discussion List
> [mailto:[log in to unmask]] On Behalf Of Robert Citkowitz
> Sent: Thursday, October 08, 2009 3:53 PM
> To: [log in to unmask]
> Subject: [PCBUILD] Any latest advice re: do/don't install SP3?
> 
> I've been holding off - haven't seen any recent discussion.
> 
> If the pros outweigh the cons, what are the cons I should be aware of?
> 
> Thanks,
> Rob
> 
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