
Other UI changes in this build include the ability to hide the "Task View" and "Search" buttons from the Taskbar, updated minimize and restore animations, updated menu icon for "Metro-Style" apps from 3 dots to hamburger-style icon. OneDrive now uses selective synchronization of local contents with the cloud service. This build brought upon one of the most controversial changes to the operating system by removing the OneDrive's "Smart Files" that allowed users to view and work with files on OneDrive through File Explorer even if they were not synced to the device. This is the last public preview build to have the version number of 6.4. The second public preview build of Windows 10 introduces Action Center, which debuted in Windows Phone 8.1. The Windows command line console is updated with this build with new functionalities including, allowing users to cut, copy, and paste texts with the standard keyboard shortcuts, the ability to display the console at full screen at any display resolution, and transparency options. Other improvements in this area include the expansion of the window snapping feature allowing apps to be snapped on up to four corners with "Snap Assist" feature that suggest other windows to snap when the users snaps a window.

Improvements are made to window management with the introduction of Task View that features virtual desktops. In this build, "Metro-Style" apps, direct predecessors to UWP apps, can be run in floating windows. It introduces a hybrid start menu that combines the functionality of that of Windows 7 and Windows 8.1. This is the first public preview build of Microsoft Windows 10. Preview builds of Windows 10 version 1507 Support of version 1507 ended on for devices in the Current Branch and Current Branch for Business. The final release was made available to Windows Insiders on July 15, 2015, followed by a public release on July 29, 2015.

A "Continuum" mode that allows users to switch between desktop mode and tablet mode.The introduction of Cortana, a virtual assistant, to the desktop version of Windows.Notable changes in this version include: It was retroactively named "version 1507" by Microsoft per its naming conventions that have the last 2 digits of the year and the month number for future stable releases of the operating system. It carries the build number 0 while Microsoft has stated that there was no designated release to manufacturing (RTM) build of Windows 10, build 10240 was described as an RTM build by various media outlets. The original version of Windows 10 (also retroactively named version 1507 and codenamed "Threshold 1") was released in July 2015.
