Windows 8 

Windows 8 is the upcoming version of Microsoft Windows that follows Windows 7. It features a new Metro-style interface that is designed for touchscreen input. It also adds support for the ARM processor architecture in addition to the previously supported x86 microprocessors from Intel and AMD. Its server counterpart is codenamed Windows Server 8. A release date for the finished version of Windows 8 has been set for October 2012. The most recent pre-release version is the Consumer Preview, which was released on February 29, 2012.

New Features 

Metro UI

Windows 8 will employ a new user interface based on Microsoft's Metro design language. The Metro environment will feature a new tile-based Start screen similar to the Windows Phone operating system. Each tile will represent an application, and will be able to display relevant information such as the number of unread messages on the tile for an e-mail app or the current temperature on a weather application. Metro-style applications run in full-screen, and are able to share information between each other using "contracts". They will be available through the new Windows Store. Metro-style apps are developed with the new Windows Runtime platform using various programming languages, including C++, Visual Basic, C#, and HTML/JavaScript.

The traditional desktop environment, for running desktop applications, is treated as a Metro app. The Start button has been removed from the taskbar in favor of a Start button on the new charm bar, as well as a hotspot in the bottom-left corner. Both open the new Start screen, which replaces the Start menu.

Other features

• Internet Explorer 10 will be included both as a Metro-style app, which will not support plugins or ActiveX components, and a desktop version which resembles Internet Explorer 9 and will maintain legacy plug-in support.
• Ability to sign in using a Windows Live ID. This will allow for the user's profile and setting to be synchronized over the internet and accessible from other computers running Windows 8, as well as integration with SkyDrive.
• Two new authentication methods: picture password, which allows users to log in by drawing three gestures in different places on a picture,[38][39] and PIN log in, which allows users to authenticate using a four digit pin.
• Windows Explorer will include a ribbon toolbar, and have its file operation progress dialog updated to provide more detailed statistics, the ability to pause file transfers, and improvements in the ability to manage conflicts when copying files.
• Hybrid Boot will use "advanced hibernation functionality" on shutdown to allow faster startup times.
• Bootable Windows To Go USB flash drive
  Windows To Go will allow Windows 8 to be run from a bootable USB device (such as a flash drive).
• Two new recovery functions are included, Refresh and Reset. Refresh restores all Windows files to their original state while keeping settings, files, and Metro-Style apps, while reset takes the computer back to factory default condition.
• Native USB 3.0 support
• A new lock screen
• New task manager design