Windows 7's Taskbar shows change. Windows 7 has tools you can use to display or hide the icons in the Notification Area. You can also suppress its notifications individually or collectively. You can also shuffle the icons by dragging them from one place to the other.
Windows 7 task bar
The familiar tabs containing the name of a running application and its icon will in probability be replaced by large icons that represent running applications.
In Windows 7, thumbnails for multiple windows appear onscreen simultaneously, in a ribbon like horizontal strip.
At the far right of the new Windows 7 Taskbar, you will see a blank rectangular area. Clicking on it will minimize all open windows.
Windows 7 also has a new feature : "Jump List". Jump lists provide one-click access to various tasks associated with an application
The sidebar is gone. But the gadgets remain and can be placed on the desktop.
The UAC in Windows 7 adds two intermediate settings, apart from the fully enabled UAC or the disabled UAC. One notifies you of attempts to install software or change settings without making you click to continue, and the other notifies you, only when a program tries to change settings. The new UAC settings reside in a new Control Panel section called Windows Solution Center, which replaces Vista's Security Center.
You can also apply Styles or Themes to the Windows 7 interface. You can chose your own wallpaper, color schemes, sounds, and screen savers, and moreover also see its preview before deciding to apply it.