Two weeks have passed since Microsoft warned users about a critical vulnerability in a common Windows protocol that could enable a hacker to remotely take over machines without even a click from their owners, potentially allowing an infectious worm to rip through millions of PCs. That bug might be fading from the headlines, but it still lingers in at least 900,000 computers.

Get in-depth coverage of current and future trends in technology, and how they are shaping business, entertainment, communications, science, politics, and society.