In my office we are not touching service pack 2 till the IT people can do more testing on it; good enough for me, I'm not downloading it at home till they are happy with it at the office.
Some people haven't had any problem with the service pack others are screwed like me. Ive been running in safe mode with networking all week.
My wife says she's likely going to reformat all of our computers anyway. Right now shes gone for about 18 hours a day between work and school.