Microsoft released a new Windows 10 PC preview build this week, 10122, to Windows Insider members. However, the company continues to work internally on the OS and now a video has been posted that shows some new additions to an unreleased build, 10125.
As posted by WinBeta, the video shows that this version includes a back button for when Windows 10 works in tablet mode for use in apps. The clip shows two additions to the Start menu. The Apps List category now has an alert when new apps are added, and items can now be pinned to the list section of the menu via Settings. Finally, the video shows that some of Windows 10's icons have a new look.
The site also mentions separately that this 10125 build adds support for Microsoft Hello, which is Windows 10's new security feature. Among other things, it will let users sign into the OS with their eyes, fingerprint or face if their PC has the right hardware. WinBeta did not have a PC that could actually run Windows Hello's features but it does show off the set-up process.