Windows 10 build 9924 (fbl cortana)

Windows 10 build 9924 (fbl_cortana) is a build of Windows 10. It was first briefly showcased by Joe Belfiore in a Windows 10 special press event at Microsoft's Redmond campus on 21 January 2015. Later on 23 January 2015, a Chinese IT news site had showcased this build in the article "Microsoft release meeting: Windows 10 system holographic projection technology Surface debut", showcasing the notification center and Windows Phone aspects in the operating system. It was also demonstrated in Microsoft's video "How Cortana Comes to Life in Windows 10" to show how Cortana is capable of performing many user tasks. Builds 9926 and 10011 were also demonstrated in the same video.