Metric system goes more to an "universal" and objective way of measurement, taking out humans (even life) of the scale. Even the originally arbitrary meter is now defined in relation of an universal constant.
After I clean up the mess, I install Security Essentials, make Firefox default, and turn on automatic updates. I explain to the user about how to avoid infections in the first place, and address any questions or concerns they have.
And, well, that's it. They leave happy, and I never hear from them again unless the hardware breaks, because the software just keeps working.
How many AV packages should a system have installed, anyway?