Here are 16 actual error messages seen on the computer screens in Japan, where they are written in Haiku.
Aren't these better than, "your computer has performed an illegal operation"?

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The Web site you seek cannot be located, but countless more exist.
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Chaos reigns within. Reflect, repent, and reboot. Order shall return.
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Program aborting: Close all that you have worked on. You ask far too much.
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Windows NT crashed. I am the Blue Screen of Death. No one hears your screams.
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Yesterday it worked. Today it is not working. Windows is like that.
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Your file was so big. It might be very useful. But now it is gone.
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Stay the patient course. Of little worth is your ire. The network is down.
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A crash reduces your expensive computer to a simple stone.
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Three things are certain: Death, taxes and lost data. Guess which has occurred.
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You step in the stream, but the water has moved on. This page is not here.
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Out of memory. We wish to hold the whole sky, but we never will.
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Having been erased, The document you're seeking must now be retyped.
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Serious error. All shortcuts have disappeared. Screen. Mind. Both are blank.