There are more *nix security threats found daily because, there are not 48493 different versions of Windows, where as there are with *nix. FreeBSD, OpenBSD, NetBSD, PicoBSD, BSD, Solaris, SunOS, Red Hat, Slackware, SuSE, Gentoo, Caldera, Corel, Mandrake, Debian, TurboLinux, Knoppix, Lindows, HP-UX, and God only knows how many others.