Microsoft: Worm Attack is Your Fault: "Only Windows 2000, eh? According to AssetMatrix, Windows 2000 is the most-often used Windows version in medium- and large-sized corporations, edging out XP 48 percent to 37 percent. Put another way, roughly half of all Windows installs in corporations are Windows 2000.
So we have an interesting situation. Hackers are now able to exploit Windows flaws within days, and when they do so, corporations are admonished by Microsoft. No offense to the world's largest software company, but that's no way to talk to customers."