When the service pack 2 first came out I installed it, but it gave me nothing but problems. I thought I had a virus that I couldn't find. Finally a service tech from Juvio took a look at my system and told me it was the sp2. I called Microsoft and they agreed with the service tech. I was told by the service tech to uninstall it as I had plenty of backup and didn't really need it. So I uninstalled it and haven't had a major problem since.
I like to hear if anyone else ran into the same problem.