Don't Bug Me!

The new way to fight PC viruses is software that automatically updates itself. But does it work?

The best computer toy I ever lost was a demo disc of PC viruses I came across about a decade back. The software was a sort of digital rogues' gallery, intended to "educate" the user by demonstrating how certain bugs behaved. Activate the "Cascade" demo, for instance, and letters would pop out of your text like rotten teeth and collect in a pile at the bottom of your screen. These domesticated viruses weren't infectious like their cousins in the wild. If you just removed the floppy from the PC, the mischief would cease.

Back then, such faux viruses were the only...

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