Barron Mertens admits to being puzzled last January when a cluster of Windows 2000 servers he runs at an Ontario university began crashing at random. The only clue to the cause was an identical epitaph carved into each Blue Screen of Death, a message pointing the blame at a system component called "ierk8243.sys." He hadn't heard of it, and when he contacted Microsoft, he found they hadn't either. "We were pretty baffled," Mertens recalls. "I don't think that cluster had bluescreened since it was put into production two years ago."
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