Install SP3 and a security suite (AV and firewall) when you are disconnected. After that, you are safe to connect to the internet, update your security suite, and download Windows Updates.
Ah, ok. When Ectech said to install (about 112) updates released prior to SP3 before installing SP3 itself, I thought installing them out of chronological order might cause some problem. I know SP1a or SP2 must be installed before installing SP3, so I wasn't sure which prior-to-SP3-updates were being referred to (I'm guessing the ones between SP2 and SP3, though SP3 is supposed to include all previously released updates).
Install SP3 and a security suite (AV and firewall) when you are disconnected. After that, you are safe to connect to the internet, update your security suite, and download Windows Updates.
A good AV is Avast: http://www.avast.com...ast_4_home.html
Use that with the Comodo firewall: http://personalfirewall.comodo.com/
When you install Comodo, and you already have an AV suite, make sure that you only install the firewall, not Comodo's AV.
I use Norton Internet Security 2009, and it will be the first thing installed
Thanks for all your help!