Since installing Internet Explorer 7, yahoo mail will not connect to my address book to complete the "To" fiel

Please check if the intenet connection works. An internet connection can become slow or stop working due to a number of reasons depending on the type of the connection. Many of the problems can be solved by making software changes or small hardware corrections. Detailed instructions at http://tinyurl.com/yl62gz

You have to know what you are doing!! If you don't, let somebody else install it!!