Filed under: Desktops, LaptopsWe're always a little wary of unconfirmed speed reports derived from beta software -- especially when no build number is given -- but a Florida shop called Devil Mountain Systems is claiming that Windows XP SP3 will offer a 10 percent speed increase over SP2, going so far as to call it a "must-have update." On the flip side of the coin, it looks like Vista SP1 won't offer much in the way of noticeable fixes, and certainly won't speed things up. Of course, it's not at all unexpected that the finely-tuned