Actually, the light bulb example oversimplifies the Y2K problem. Computers are linked together into networks, and networks are linked to other networks. A light bulb doesn't begin to compare with the complexity of a computer. The reason why some people think of Y2K as a virus is that the problem is capable of spreading from one computer to another.
用燈泡來比喻千禧蟲，其實失之過簡，因為電腦系統網網相連，比單個燈泡複雜何止千百倍，千禧蟲之所以被視為一種「病毒」，也是因為它們具有傳染的特性。