Windows Copilot aims to be your best friend forever, but can you trust it?

Microsoft Copilot is more than just a tool–it’s designed to learn your preferences and tastes, and even anticipate your needs by buying stuff. Whew! That’s a big concept to try and get your head around. But that’s what Microsoft is trying to do, as it transitions to the next stages of its Copilot assistant.

We’ve used the term “assistant” rather loosely over the past few years. In part, that’s due to the aspirational marketing of companies like Google and its “Google Assistant,” which...