Good luck for the average person with Windows, when their laptop might come with spyware, and sometimes even a complete rootkit, directly from the OEM.
Eventhough these are bad, they are not viruses and do not fit the anecdote. If you are constantly getting viruses (Note not preinstalled rootkits or other stuff) than you are doing something wrong, I don't think we have to argue about that right?
Or, you know, just switch to an OS where you don't.