Certain features in Windows 7 are on by default and certain are off. The ones that are on tend to eat up the computer’s speed and capability. These features may include those which are not used frequently or at all by yourself.
Turning such features off is an excellent idea to lighten your computer. To Turn Windows Features on or off, you simply have to access the Turn Windows Features on or off window, which is where you can pick and choose the features that you want to keep on.