Using Win7 my main site is centurylink.net, with email of Embarqmail.com. (I also send/receive email on Google, MSN, Yahoo.) I have no problem sending email using their email sites. However, when I go to a website (such as a department store) and click "contact us" I type my message, click send, and then see: "Please install an email program or, if one is already installed, create an association in the default programs panel." Whatever that is, how do I do it?