Looks like the service pack installed correctly. I had a svchost.exe failure glaring at me when I got home, but the installation went well. I am to hope that I am to get no more of those errors.
The cat was very helpful.
I hope my roommates will find jobs soon so that I may update my glasses (the last service pack was installed in 2000) and get a DSL router, because it's looking like we're needing one, and needing it badly.