Dynize Technologies

In new windows 10, Type or say what you want.
you just need to start with "Hey Cortana!"
Read the article
http://www.pcworld.com/article/2873557/hands-on-with-windows-10-consumer-preview-hey-cortana-is-that-a-start-menu.html

and
you can also download the preview of Windows 10 Operating System, from Right Here
http://www.pcworld.com/article/2874800/microsofts-windows-10-build-9926-with-cortana-is-live-now.html

Hands-on with Windows 10 consumer preview: Hey Cortana, is that a Start Menu? In Technical Preview Build 9924, Cortana joins forces with notifications and search to make WIndows more responsive. There's a Start Menu of sorts, too.