To be clear, I wasn't arguing that a user is less likely to run into issues on Windows (or Mac). The bigger issue is that when they invariably run into an issue it's significantly easier to get the help they need to return their computer to a working state. Between their computer manufacturer, their university/company IT department, friends, relatives, blogs, books, senior citizen tech-support groups, etc there are simply more resources available, and especially more resources that are tailored to a less technical audience.