Your scenario may entertain the faithful but it is not valid
The writer who called Windows a virus clearly stated that it was a virus to him when he could not do what he wanted with his computer not when he was silly enough to use every default known to man or MS
I've been running Windows (many and/or all flavors) at home and as an administrator for years. Nothing of mine silently updates, not did I have to config the registry or do anything complex other than use a mouse to get it to run the way I wanted it to.
The writer did not give an example of 'viroid' behavior and you did not give a legitimate one
So....
A