It's the fault of companies for never upgrading their machines, giving full administrators access to every employee and using Admin123 as the domain administrator password account.
If we believe the article, the virus came from an attachment in an email to a random employee. Why are executable attachments not blocked? Why is an executable running as an unprivileged user able to storm through every computer in the company?
> Why are executable attachments not blocked?
Because there are dozens of weird Windows extension types that execute automatically on Windows, though yeah the attachment should have been blocked and a customer service machine should have a whitelist of programs that need to run (or only run signed ones)