I am not an expert, but I can tell you that you won't get much of a response
from this newsgroup unless you give more details. You refer to your system.
What is the size of your hard drive? How much RAM do you have? You see it is
just possible that you have so little space that the addition of SP2, with
its back up files, may be overloading your system. But it may be something
else. So please tell everyone more about your system. I hope that this will
help someone in this group to help you.