The upcoming April Fool's Day in 2010 reminds us that it has been a full year since the Downadup (also known as Conficker) virus hit. A year ago, the security industry detected the Downadup virus and took precautions against the criminal behavior behind it. Fortunately, Downadup did not evolve into a large-scale threat, nor did it cause the significant damage that it had the potential to inflict.