Why is it always the wicked who live into ripe old age? The computer virus, that scourge of the securely unvigilant, has just turned 40. You'll forgive us if the champagne isn't flowing. Two score ...

The computer virus has reached a new milestone: Its 40th birthday. And the evolution from the crude Creeper virus on 1971 to last year's Stuxnet virus, which could very well have marked the first shot ...