Hi:
I would also encourage to update SP2, as you may already know, security is a
serious problem for all of us now.
However, I wish to remind you to follow the guidelines provided by MS to
install SP2, and make sure you do visit your hardware vendors' (e.g.
printers, VGA, M/B for BIOS, etc.) sites to see if there are known problems,
instructions, or updated drivers related to SP2.
SP2 is a major update so we shall be a little be more cautious.
Hope this will help.