GENERALLY SPEAKING, the single most important thing you can do to keep your computer safe is make sure your operating system and apps are up-to-date. That annoying box that nags you to install Windows Updates? Unfortunately, it’s good advice. Because though it looks like nothing has changed afterwards, below the surface every update—or "patch"—is fixing bugs and holes that can be exploited by hackers.
The problem is that modern computer systems are so wildly complicated that it is basically impossible for developers to build a
