At its Build 2024 conference, Microsoft unveiled a new AI trick for Windows PCs—one that can help users locate or remember details from their digital past. It could be looking for a PDF file worked on a couple of weeks ago. Or perhaps finding the name of a restaurant recommended by a friend earlier this year. Called Microsoft Recall, this feature could save you many lost minutes trying to hunt down whatever’s eluding your memory. Yet even before its launch, Microsoft Recall is already giving security experts indigestion. Underneath the futuristic shine, Recall comes with a potential massive hi…