This how-to article details how to add or remove operating system features in Windows 7. This can be useful if there are features unnecessarily installed in Windows 7, or if there are features missing or required.

1. Click on the Start button in the bottom left, then choose Control Panel.
   
2. Click on Programs in the bottom left.
   
3. Click on Turn Windows features on or off and allow or grant permission if prompted.
   
4. To remove an unwanted Windows feature, uncheck the box next to it and click OK.
5. To add a feature, check the box next to it and click OK.