Microsoft’s annual developer conference, Build, kicked off at 3am Melbourne time on Wednesday. I didn’t stay up to watch - but I’ve absorbed the media releases and technical docs, and there’s a genuine shift happening here that’s worth unpacking.

TL;DR for the non-technical: AI assistants are about to get much more capable, but that creates a trust problem - how do you let a smart assistant do things on your computer without giving it the keys to everything? Microsoft just announced that Windows itself will act as the security guard. It will control exactly what an AI assistant can see and touch on your machine, track what it does separately from what you do and run smaller AI models directly on your computer so your data doesn’t have to leave your desk. Think of it as giving your AI assistant its own office with its own keycard, instead of letting it wander freely through yours. The catch: it needs newer, more powerful hardware to work properly, and most of it isn’t shipping yet.

Now, the details.

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