Cortana, Microsoft’s clever digital assistant on Windows Phone 8.1, makes the jump to PCs with Windows 10, where she assumes control of the operating system’s search functions. Cortana will want to access your personal info, then use that info along with her Bing-powered cloud smarts to intelligently surface information you’re looking and perform other helpful tasks.
Cortana can help you call a friend, schedule a reminder, set an alarm, check your calendar, compare stocks, and more, all via natural language queries you ask using text or voice commands. Cortana can also apply those natural language smarts to use search your hard drive, OneDrive, and business network for files that meet certain filters, like “Find me pictures from May.”
It’s deeply cool… though the initial Cortana build can be a bit flaky.