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This error message came out in 2008 as a joke. It was actually deemed a harmless worm, but it came at a sensitive time.
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This error was actually a clever ruse by a flash game company to get traffic to their website. Clicking "ok" got you to the website, but it certainly seemed more intimidating.
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This was one of those blatant troll popups. There was no way around it. It was a virus from 2005 that jammed your mouse driver and gave you this popup.
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