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Taskbar
The new Windows 7 Taskbar enables users to be more productive by providing quicker access to information. The enhanced taskbar introduces interactive thumbnails, and enables animation and interaction for minimized applications.
Libraries
Libraries are destinations where developers and end-users can find and organize their data as collections across multiple locations on local or remote computers. Develop applications that create, interact with, and support libraries as first-class items within applications to provide a seamless user experience.
Search Federation
Windows 7 supports searching for documents beyond the user’s own PC. Developers and IT professionals can enable their search engines, document repositories, Web applications, and proprietary data stores to be searched from Windows 7 without needing to write and deploy client code. This enables end-users to search their corporate intranet or the Web as easily as they can search for their local files — all from within the same familiar Windows interface.
Instrumentation and performance
Windows 7 includes new Event Tracing for Windows (ETW) capabilities that developers can take advantage of during the development process to optimize application performance. Windows 7 includes new ETW underlying technology that makes the task of including instrumentation in your application much easier.
Trigger-start services
Windows 7 Service Control Manager has been extended so that a service can be started and stopped automatically when a specific system event, or trigger, occurs on the system. Trigger-start capabilities remove the need for services to start up automatically at computer startup and then poll or wait for an event to occur.
Troubleshooting platform
Windows 7 delivers a comprehensive and extensible Troubleshooting Platform that uses a PowerShell-based mechanism to research and resolve problems. The key components include a troubleshooting package, troubleshooting engine, and troubleshooting wizard. The engine launches a PowerShell runtime to execute a troubleshooting package, and exposes a set of interfaces to control pack execution.


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