I installed SP2 yesterday on 4 computers. The fouth, which was my home computer, failed to reboot after the service pack was installed. It freezes at the bootup screen. I fear I will have to reformat the entire PC, as I can't find any information about the problem on the net, and MS has yet to provide any troubleshooting for it.

So just beware before you install it, and back up what is importaint