With Windows 7 you can now remove the windows features you don't need. You can also add features when you think of using it back again. Below is the instruction on how to do this

Step I - Go to your Control Panel.

Step II - Click on Programs as marked below.

Step III - Click on Turn Windows Features on or off as marked below.

Step V - To turn a feature on, select it's check box. To turn a featur off, clear it's check box. A filled box means that only part of the feature is turned on.

Step VI - Once you decide what feature to be remove tick the box and click ok. It might take several minutes depending on how many features you are turning on/off. Once you click OK you will see dialog box as below