A: No, Windows is not a virus. Here's what viruses do:
They replicate quickly - okay, Windows does that.
Viruses use up valuable system resources, slowing down the system
as they do so - okay, Windows does that
Viruses will, from time to time, trash your hard disk - okay
Windows does that too
Viruses are usually carried, unknown to the user, along with
valuable programs and systems Sigh... Windows does that, too.
Viruses will occasionally make the user suspect their system is
too slow (see 2) and the user will buy new hardware Yup, that's
with Windows, too
Until now it seems Windows is a virus but there are fundamental
differences:
Viruses are well supported by their authors, are running on most
systems, their program code is fast, compact and efficient and they
tend to become more sophisticated as they mature. So Windows is not
a virus. It's a bug.