This article describes how Yahoo! Search Protection prevents third-party software from changing your internet browser's default search engine.

Yahoo! Search Protection is an application that allows you to manage Yahoo! as your default search engine. When third-party software tries to change your default search settings, Yahoo! Search Protection will alert you of the attempt. A prompt will allow you to accept the changes you want to make or cancel the changes and keep your original settings. Currently, this application is only available for Internet Explorer 6 and 7.