My laptop slowed down after SP2..have no idea why. other than that..no hassles. had a bit of trouble with spybot and adware..so my comp tech chap told me to de-install them both, as SP 2 did the trick. I kept adware. I have XP. Nuke..even my laptop came in with XP preinstalled..but downloading the service pack didn't affect it. It dwnloaded just what it needs. How is firefox with sites, drac? Saw it for the first time today on someone's comp..looked really neat..dunno about the features.