It's an OfficeJet 6110 All-In-One, and I'm using MS XP Pro. It's not plugged in directly, but through a network hub/router/thingydoo (guess which one of us is not the hardware geek?). My next step was going to be to reinstall, after unplugging both the computer and the printer from the thingydoo, and do the install as if I'm going to connect directly to the printer (which is what the installation file seems to want).