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Microsoft has published their minimum specifications for a system running Windows 7.[94] Requirements for the 32-bit version are much the same as recommendations for premium editions of Vista, but the 64-bit versions are considerably higher. Microsoft has released an upgrade advisor that scans a computer to see if it is compatible with Windows 7.
Minimum hardware requirements for Windows 7[94]
Architecture 32-bit 64-bit
Processor 1 GHz 32-bit processor 1 GHz 64-bit processor
Memory (RAM) 1 GB of RAM 2 GB of RAM
Graphics Card DirectX 9 graphics processor with WDDM driver model 1.0 (For Aero)
HDD free space 16 GB of available disk space 20 GB of available disk space
Optical drive DVD drive (only to install from DVD/CD Media)
Removed features
Main article: Features removed from Windows 7
A number of capabilities and certain programs that were a part of Windows Vista are no longer present or have changed, resulting in the removal of certain functionality. Some notable Windows Vista features and components have been replaced or removed in Windows 7, including the classic Start Menu user interface, Windows Ultimate Extras, InkBall, and Windows Calendar. Four applications bundled with Windows Vista — Windows Photo Gallery, Windows Movie Maker, Windows Calendar[60] and Windows Mail — are not included with Windows 7, but are instead available for free in a separate package called Windows Live Essentials.
Features
New and changed features
The new Action Center, which replaces Windows Security Center
Main article: Features new to Windows 7
Windows 7 includes a number of new features, such as advances in touch and handwriting recognition, support for virtual hard disks, improved performance on multi-core processors,[33][34][35][36] improved boot performance, DirectAccess, and kernel improvements. Windows 7 adds support for systems using multiple heterogeneous graphics cards from different vendors (Heterogeneous Multi-adapter), a new version of Windows Media Center,[37] a Gadget for Windows Media Center, improved media features, the XPS Essentials Pack and Windows PowerShell being included, and a redesigned Calculator with multiline capabilities including Programmer and Statistics modes along with unit conversion. Many new items have been added to the Control Panel, including ClearType Text Tuner, Display Color Calibration Wizard, Gadgets, Recovery, Troubleshooting, Workspaces Center, Location and Other Sensors, Credential Manager, Biometric Devices, System Icons, and Display.[38] Windows Security Center has been renamed to Windows Action Center (Windows Health Center and Windows Solution Center in earlier builds), which encompasses both security and maintenance of the computer. The default setting for User Account Control in Windows 7 has been criticized for allowing untrusted software to be launched with elevated privileges by exploiting a trusted application.[39] Microsoft's Windows kernel engineer Mark Russinovich acknowledged the problem, but noted that there are other vulnerabilities that do not rely on the new setting.[40] Windows 7 also supports Mac-like RAW image viewing through the addition of WIC-enabled image decoders, which enables raw image thumbnails, previewing and metadata display in Windows Explorer, plus full-size viewing and slideshows in Windows Photo Viewer and Window Media Center.[41]
The taskbar has seen the biggest visual changes, where the Quick Launch toolbar has been replaced with pinning applications to the taskbar. Buttons for pinned applications are integrated with the task buttons. These buttons also enable the Jump Lists feature to allow easy access to common tasks.[42] The revamped taskbar also allows the reordering of taskbar buttons. To the far right of the system clock is a small rectangular button that serves as the Show desktop icon. This button is part of the new feature in Windows 7 called Aero Peek. Hovering over this button makes all visible windows transparent for a quick look at the desktop.[43] In touch-enabled displays such as touch screens, tablet PCs, etc., this button is slightly wider to accommodate being pressed with a finger.[44] Clicking this button minimizes all windows, and clicking it a second time restores them. Additionally, there is a feature named Aero Snap, that automatically maximizes a window when it is dragged to either the top or left/right edges of the screen.[45] This also allows users to snap documents or files on either side of the screen to compare them. When a user moves windows that are maximized, the system restores their previous state automatically. This functionality is also accomplished with keyboard shortcuts. Unlike in Windows Vista, window borders and the taskbar do not turn opaque when a window is maximized with Windows Aero applied. Instead, they remain transparent.
The Windows 7 taskbar.
For developers, Windows 7 includes a new networking API with support for building S