No, Windows is not a virus.
Here's what viruses do:
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.
Enough is enough. Vote Libertarian if you believe in individual liberty and personal responsibility, a free-market economy, and a foreign policy of non-intervention, peace, and free trade.