Updating from os 10 4 to 10 5
Foley reported that among the goals for Threshold was to create a unified application platform and development toolkit for Windows, Windows Phone and Xbox One (which all use a similar Windows NT kernel).
In April 2014, at the Build Conference, Microsoft's Terry Myerson unveiled an updated version of Windows 8.1 that added the ability to run Windows Store apps inside desktop windows and a more traditional Start menu in place of the Start screen seen in Windows 8.
Windows apps share code across platforms, have responsive designs that adapt to the needs of the device and available inputs, can synchronize data between Windows 10 devices (including notifications, credentials, and allowing cross-platform multiplayer for games), and are distributed through a unified Windows Store.
Developers can allow "cross-buys", where purchased licenses for an app apply to all of the user's compatible devices, rather than only the one they purchased on (e.g., a user purchasing an app on PC is also entitled to use the smartphone version at no extra cost).
Desktop software distributed through Windows Store is packaged using the App-V system to allow sandboxing.
A new iteration of the Start menu is used on the Windows 10 desktop, with a list of places and other options on the left side, and tiles representing applications on the right.
The second column displays Windows 8-style app tiles.At the Microsoft Worldwide Partner Conference in 2011, Andrew Lees, the chief of Microsoft's mobile technologies, said that the company intended to have a single software ecosystem for PCs, phones, tablets, and other devices."We won’t have an ecosystem for PCs, and one for phones, and one for tablets—they'll all come together." Foley called Threshold a "wave of operating systems" across multiple Microsoft platforms and services, scheduled for the second quarter of 2015.Myerson said that these changes would occur in a future update, but did not elaborate.
Microsoft also unveiled the concept of a "universal Windows app", allowing Windows Store apps created for Windows 8.1 to be ported to Windows Phone 8.1 and Xbox One while sharing a common codebase, with an interface designed for different device form factors, and allowing user data and licenses for an app to be shared between multiple platforms.Critics also praised the improvements to Windows 10's bundled software over Windows 8.1, Xbox Live integration, as well as the functionality and capabilities of Cortana personal assistant and the replacement of Internet Explorer with Microsoft Edge.