Windows Vista is loaded with special features, many of which it will install by default, even if you do not need them. You can speed up your computer system by turning off those that you don't need.
Unlike other earlier Windows versions, you do not need to uninstall these features, but simply turn them off instead. For this reason, disabling a feature does not uninstall it or decrease the amount of hard space that it takes up on your hard disk. Instead, the feature remains stored on your hard disk, but does not drain system resources.