Microsoft software caused air traffic shutdown - silicon.com

Now Here's A Comforting Thought:

From Silicon.com:

Nearly all of Southern California's airports were shut down and five incidents where aircraft broke separation guidelines were reported. In one case, a pilot had to take evasive action.

The newspaper said that a Microsoft-based replacement for an older Unix system needed to be reset every thirty days 'to prevent data overload', as a result of problems found when the system was first rolled out. However, a technician failed to perform the reset at the right time and an internal clock within the system subsequently shut it down. A back-up system also failed.

And this is without hackers going after the thing. This is just the way it usually works.