A website announces, “Free celebrity wallpaper!” You browse the images. There’s Selena Gomez, Rihanna and Timothée Chalamet—but you settle on Taylor Swift. Her hair is doing that wind-machine thing that suggests both destiny and good conditioner. You set it as your desktop background, admire the glow. You also recently downloaded a new artificial-intelligence-powered agent, so you ask it to tidy your inbox. Instead it opens your web browser and downloads a file. Seconds later, your screen goes dark.
