Its like leaving your home door opened 24/7. You might go three years befoe someone decides to rob you, then all of a sudden when you least expect it, you get hit, and it will happens, more than likley it will be a virus. Since you dont have those updates, you are more than likely to receive those viruses because the updates were put out because of those viruses, exploits, etc. Just like the WMF fix that came out a few months ago. Its possible you can get it even if you have a firewall, FF, router, etc is NOT going to stop everything, I guarantee it. There is a reason for the updates, they dont put them out there for nothing. And there are updates in SP2 that you dont currently have on your system that you might like.