You just contradicted yourself in one line of text
Edit :
On Windows OS 7
Windows 7 is enough stable to be useable, but its still not clean sailing.
People who claim never to have had a virus, who says, you might even don't know you had one.
Only if you are not connected to the internet that statement might be true.
Virus scanners are always on and use energy, if there wouldn't be virusses there would be huge power savings if you take into account all computers in the world.
Virus scanners suck, in the beginning they are mostly free and use little resources but when they get popular they tend to add more and more crap and become hogs on the computer.
What is still the same is when you get an error, as has been for a long time you still get those strange errors like "The program must shut down Error x01bd534d??????
If I go back to My country many family and friends are asking Me to help with their Windows computers cause of problems with them, and that's (still) the truth.
Glad to have Macs since 13 years ago.
(My old Powerbook G4 booted up faster than W7)