No, Windows is not a virus. Here's what viruses do:

1) They replicate quickly - okay, Windows does that.
2) Viruses use up valuable system resources, slowing down 
   the system as they do so 
   - okay, Windows does that.
3) Viruses will, from time to time, trash your hard disk 
   - okay,  Windows does that too.
4) Viruses are usually carried, unknown to the user, along with  
   valuable programs and systems.  
   Sigh... Windows does that, too.
5) 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.

COPYRIGHT HICOSOFT GMBH 1997