To Optimize vista up to your level of comfort and have a control for what to install and what not to have on the system (uninstall). Here is the guide to help you out to do so.
To access the Vista Features screen you should follow these steps:
-       Click on the Start button to open your Start Menu. The Start button looks like this:
 
 
- When the Start Menu opens click on the Control Panel menu      option.
 
 
- When the Control Panel window opens click on the Uninstall a program      option option under the Programs category. This option is shown by the arrow      in the image below. If you are using the Classic View of the Control Panel,      then you would double-click on the Programs and Features      icon instead.
 
 
 
 
 
- You will now be presented with the Programs and Features      screen, or Uninstall or change a program screen, as shown in the image below.
 
 
 
 
 To access the Windows features screen you need to single-click on the option labeled Turn Windows features on or off as designated by the arrow in the image above.
 
 
- Windows Vista will now ask for your permission to access the Windows Vista      Features. You should click on the Continue button to give      this permission.
 
 
- The Windows Vista Feature List window will now open displaying all the Features      available for your version of Vista. An entry can be a single feature or a      feature with sub features. When enabling features that have sub features it is possible      to only enable those sub features that are required by you. This enables you to      finely tune how you want Vista to operate.
 
 
 
 
 Next to each feature is a box that can have three states. If the checkbox is checked that means that the feature, and all of its subfeatures if it has any, are enabled. If the box is filled with a solid blue color, then that means that some subfeatures of this feature are enabled but not all of them. If the checkbox is empty, then that feature and none of its subfeatures are enabled.
 
 To enable a feature, simply put a checkmark next to the feature name. To disable a feature simply remove the check from the feature or one of its subfeatures. When you are happy with how you disabled and enabled the features, you should click on the OK button to save these changes.
Now that you know how to access the Windows Vista Feature List and to activate    and disable features you can control what programs and capabilities are available    to you when using Vista. For a description of each feature, if they are enabled    by default, and whether or not you need it, please read Windows Vista Feature List.
Info extracted from its source at bleepingcomputer
