Help!! I have Dell Dimension 4550. Several months ago I installed Win XP sp1... This slowed my machine drastically, so I uninstalled the service pack... Now I understand there is yet another xp update. Was whatever caused the slow down in sp1 ever fixed? What process / sequence should I follow to bring my system up to date? I can't live with the "slowness" that sp1 created -- does that risk / threat still exist?? thanks