First of all, you guys know how you regularly get those "Windows Updates" automatically installed on your computer right? Well, there's one update waiting to be installed on mine, but I haven't installed it yet because I'm a little uncomfortable about... now ALL of these updates recommend you "close all other running programs" while the update is installed, BUT this one is also recommending that I "back up the system". THAT makes me uncomfortable! The update is "Windows XP Service Pack 2",and I was wondering if anyone else has installed this update, and if so, WHAT does it do to your system that it recommends you to back it up?!