New features and functionality in Windows 8 include a faster startup through
UEFI integration and the new "Hybrid Boot" mode (which
hibernates the Windows
kernel on shutdown to speed up the subsequent boot), a new lock screen with a clock and notifications, and the ability for enterprise users to create
live USB variants of Windows (also known as
Windows To Go). It also includes native support for
USB 3 devices, which allow for faster data transfers and improved power management with compatible devices, and
hard disk 4KB
Advanced Format support, as well as support for
near field communication to facilitate sharing and communication between devices.
Windows Explorer, which has been renamed to File Explorer, now includes a
ribbon in place of the command bar. File operation dialog boxes have been updated to provide more detailed statistics, the ability to pause file transfers, and improvements in the ability to manage conflicts when copying files. A new "File History" function allows incremental revisions of files to be backed up to and restored from a secondary storage device, while
Storage Spaces allows users to combine different sized hard disks into virtual drives and specify mirroring, parity, or no redundancy on a folder-by-folder basis. For easier management of files and folders, Windows 8 introduces the ability to move selected files or folders via
drag and drop from a parent folder into a subfolder listed within the
breadcrumb hierarchy of the
address bar in File Explorer.
Task Manager has been redesigned, including a new processes tab with the option to display fewer or more details of running applications and background processes, a heat map using different colors indicating the level of resource usage, network and disk counters, grouping by process type (e.g. applications, background processes and Windows processes), friendly names for processes and a new option which allows users to search the web to find information about obscure processes. Additionally, the
Blue Screen of Death has been updated with a simpler and modern design with less technical information displayed.
Safety and security New security features in Windows 8 include two new authentication methods tailored towards touchscreens (
PINs and picture passwords), the addition of
antivirus capabilities to
Windows Defender (bringing it in parity with
Microsoft Security Essentials).
SmartScreen filtering integrated into Windows,
Family Safety offers
parental controls, which allows parents to monitor and manage their children's activities on a device with activity reports and safety controls. Windows 8 also provides integrated
system recovery through the new "Refresh" and "Reset" functions, including system recovery from USB drive. Windows 8's first security patches would be released on November 13, 2012; it would contain three fixes deemed "critical" by the company. Windows 8 supports a feature of the
UEFI specification known as "
Secure boot", which uses a
public-key infrastructure to verify the integrity of the operating system and prevent unauthorized programs such as
bootkits from infecting the device's boot process. Some pre-built devices may be described as "certified" by Microsoft; these must have secure boot enabled by default, and provide ways for users to disable or re-configure the feature.
ARM-based
Windows RT devices must have secure boot permanently enabled. Bundled multimedia apps are provided under the Xbox brand, including
Xbox Music,
Xbox Video, and the
Xbox SmartGlass companion for use with an
Xbox 360 console. Games can integrate into an
Xbox Live hub app, which also allows users to view their profile and
Gamerscore. Other bundled apps provide the ability to link
Flickr and
Facebook.
Internet Explorer 10 is included as two variants – a desktop program and a
touch-optimized app. It also includes increased support for
HTML5,
CSS3, and
hardware acceleration. The app does not support plugins or
ActiveX components, but includes a variant of
Adobe Flash Player that is optimized for touch and low-power usage. Initially, Adobe Flash would only work on sites included on a "Compatibility View"
whitelist; however, after feedback from users and additional compatibility tests, an update in March 2013 changed this behavior to use a smaller
blacklist of sites with known compatibility issues instead, allowing Flash to be used with most sites by default. The desktop variant does not contain these limitations. Windows 8 also incorporates improved support for
mobile broadband; the operating system can now detect the insertion of a
SIM card and automatically configure connection settings (including
APNs and carrier branding), and reduce its Internet usage to conserve bandwidth on
metered networks. An integrated
airplane mode setting enables users to globally disable all wireless connectivity. Carriers can also offer account management systems through Windows Store apps, which can be automatically installed as a part of the connection process and offer usage statistics on their respective tile.
Windows Store apps to the right side of the screen , alongside the
Wikipedia app snapped into a sidebar to the right side of the screen. In Windows 8, desktop and everything on it is treated as one Metro-style app. Windows 8 introduces a new style of application,
Windows Store apps. According to Microsoft developer Jensen Harris, these apps are optimized for
touchscreen environments and are more specialized than current
desktop applications. Apps can run either in a full-screen mode or be snapped to the side of a screen. Windows Store apps run within a new set of
APIs known as
Windows Runtime, which supports
programming languages such as
C,
C++,
Visual Basic .NET,
C#, along with
HTML5 and
JavaScript. To ensure stability and security, apps run within a
sandboxed environment, and require permissions to use certain other functionalities, such as accessing the Internet or a camera. Retail variants of Windows 8 are only able to install these apps through
Windows Store – a namesake distribution platform that offers both apps, and listings for desktop programs certified for comparability with Windows 8. The term "Immersive app" had been used internally by Microsoft developers to refer to the apps prior to the first official presentation of Windows 8, after which they were referred to as "Metro-style apps" in reference to the
Metro design language. The term was phased out in August 2012; a Microsoft spokesperson denied rumors that the change was related to a potential trademark issue, and stated that "Metro" was only a codename that would be replaced prior to Windows 8's release. Following these reports, the terms "Modern UI-style apps", "Windows 8-style apps", and "Windows Store apps" began to be used in various Microsoft documents and material to refer to the new apps. In an interview on September 12, 2012, Soma Somasegar (vice president of Microsoft's development software division) confirmed that "Windows Store apps" would be the official term for the apps. An MSDN page explaining the Metro design language uses the term "Modern design" to refer to the language as a whole.
Web browsers Exceptions to the restrictions faced by Windows Store apps are given to
web browsers. The user's default browser can distribute a Metro-style web browser in the same package as the desktop variant, which has access to functionality unavailable to other apps, such as being able to permanently run in the background, use multiple background processes, and use
Windows API code instead of WinRT (allowing for code to be re-used with the desktop variant, while still taking advantage of features available to Windows Store apps, such as charms). Microsoft advertises this exception privilege "New experience enabled" (formerly "Metro-style enabled"). The developers of both
Chrome and
Firefox committed to developing Metro-style variants of their browsers; while Chrome's "Windows 8 mode" (discontinued on Chrome version 49) uses a full-screen version of the existing desktop interface, Firefox's variant (which was first made available on the "Aurora" release channel in September 2013) uses a touch-optimized interface inspired by the
Android variant of Firefox. In October 2013, Chrome's app was changed to mimic the desktop environment used by
ChromeOS. Development of the Firefox app for Windows 8 has since been cancelled, citing a lack of user adoption of the beta versions.
Interface and desktop Windows 8 introduces significant changes to the operating system's user interface, many of which are aimed at improving its experience on
tablet computers and other
touchscreen devices. The new user interface is based on Microsoft's
Metro design language and uses a
Start screen similar to that of
Windows Phone 7 as the primary means of launching applications. The Start screen displays a customizable array of tiles linking to various apps and desktop programs, some of which can display constantly updated information and content through "live tiles". As a form of
multi-tasking, apps can be snapped to the side of a screen. A vertical
toolbar known as
the charms The traditional
desktop environment for running desktop applications is accessed via a tile on the Start screen. The Start button on the taskbar from previous versions of Windows has been converted into a hotspot (or "hot corner") in the lower-left corner of the screen, which displays a large
tooltip displaying a thumbnail of the Start screen. Windows 8.1 added the start button back to the taskbar after many complaints, but removed the preview thumbnail. Aside from the removal of the Start button and the replacement of the
Aero Glass theme with a
flatter and solid-colored design, the desktop interface on Windows 8 is similar to that of
Windows 7. ==Removed features==