How to setup and use Cortana on Windows 10 PC

[Windows Central]

How do I use Cortana on Windows 10?
Cortana is Microsoft's digital assistant and if you want, she can always be at your fingertips, ready to help you find anything on your Windows 10 PC, give you the weather forecast, and make sure you don't miss any important dates.
By default, Cortana is not enabled on your Windows 10 PC, but it doesn't take long to get her up and running!

Full story from the WindowsCentral blog...