Windows 10 build 10074 is now available for download and testing.This is the first build to be referred as an ‘Insider Preview’. What’s new in this release?
new Live Tile animation for Start.
performance and stability improvements for Live Tiles.
support high DPI displays.
improvements to Continuum.
Snap Assist now supports the ability to close a window during Snap Assist.
New default Windows sounds.
visual refresh for Cortana.
Updated Music,Video Preview and Xbox apps.
improvements Windows Store Beta :