Yahoo! Search results show when trying access a non-Yahoo! website
When trying to access a website either by entering the address into your browser or by clicking on a link, instead of the site Yahoo! Search results relevant to the site are returned instead.
What you are seeing is the Yahoo! Search 404 handler, a feature included with Yahoo! Toolbar and other Yahoo! downloads. If your browser encounters an error while loading a page, instead of displaying just the error message "page not found" or "page could not be loaded," the Yahoo! Search 404 handler will try to figure out what you were looking for and show you relevant search results, in order to help you save some time.
Since the actual error occurred between your browser and the site you were viewing, this issue is not caused by Yahoo! or Yahoo! Search.
When you remove the Yahoo! Toolbar from your system you may see the error message text instead of the results, but the underlying cause would still exist. We recommend that you contact your Internet Service Provider for assistance regarding this matter, as this error can be related to your Internet connection.