Do not install it yet. Wait for a few weeks, until they stop failing as hard as they are wont to do when releasing SP2. I recall XP SP2, and it was just as irritating and borked as is the Vista SP2. Back then, I was working in a computer lab, and had to deal with something to the tune of 30 computers taking the SP2 up the back door, as it were. This time, it's just a couple of windows laptops that I'm maintaining. Still as painful, slow, and annoying as before. Laptop #1 BSOD'd after trying to install the fucking thing. Laptop number two did not get the "update", because I'm not trying to have a home machine break on me like that. All this giant stack of fuck-up did for me is keep the computer out of comission for the better part of two hours. I got here at 11 AM, and started up the machine. It is now 1:35, and the machine has just finished rolling back the changes after the stunning failure of the SP2 to install.
Hold off on installing it.
