Date Passes for Virus Without PC Attack

Updated April 2, 2009 12:01 a.m. ET

April 1, a much-hyped date when a sophisticated computer virus was set to potentially cause havoc, came and went without incident.

The Conficker computer virus, which has infected several million computers since November, was programmed to seek new instructions beginning Wednesday. That triggered speculation about what would happen, leading to media reports that Conficker could launch a massive cyber attack or do something similarly...

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