When you lose your car keys, send an email to the entire company. People out in the remote offices like to keep abreast of what's going on. When you bump into an I.T. support person at the supermarket on a Saturday, ask a computer question. We don't stop thinking about work just because it's the weekend. Don't bother to tell us when you move computers around on your own.
Computer names are just a cosmetic feature.
When you bring your own personal home PC for repair at the office, leave the documentation at home. We'll find all the settings and drivers somewhere. It hurts our feelings that you could even think such a thing. When we're working on reviving the server from a crash, please walk in and start telling us about your weekend car shopping spree. We're happy you have free time since your PC is not working anyway.