Microsoft added visual gadgets to Vista to make your Windows experience more pleasant and productive. Each of these gadgets is a mini, single-purpose application that is designed to perform a specific task, such as display the date and time. They can be docked to the side bar or they can "float" on your desktop.
Windows Sidebar comes with a set of 11 gadgets, three of which are displayed by default (the Clock, Feed Headlines and Slide Show) when you install Windows Vista. Each one of these gadgets taps into your CPU resources and may affect performance, particularly on an older PC. Removing some or even all of the gadgets from your desktop will free up space on your hard drive, and improve performance. Here's how: