But if Windows were ACTUALLY secure, it wouldn’t matter HOW big it was. But it’s not, which is why the various NT Windows-based OSes have had to have hundreds of security patches over the decades.
http://www.pcworld.com/article/173674/adding_up_six_years_of_microsoft_patch_tuesdays.html
Nothing is absolutely secure. If you can't deal with that, maybe you should just leave it alone.