|As a personal experience, I have had no trouble at all with SP3 (Service Pack 3). I know there are issues with SP3 on computers with some AMD processors. I have so far installed it on this computer, a Novatech laptop and an older machine and not had any trouble with it.|
How have you avoided the SP2 update? Do you not have auto update turned on?
As XpUser4Real stated, some users have had trouble with it. If you have already installed it and your computer is ok and everything is working, then leave it installed but if you install software that relies on some of the updates that were included with SP3, then uninstall SP3, those programs will no longer work! You will get a warning telling you about this though.
Computers... designed to entertain,help with work but most of all to frustrate you!