Windows 7 does not employ an e-mail client per say like XP's Outlook Express. What it does have is Windows live Mail, to access this go to All Programs and scroll all the way down to the bottom where you will find Windows Live, click on this to expand the menu and you will see Windows Live Mail.
My wife and I are using Mozilla Thunderbird
and like it very much. We have a shortcut on the desktop which makes it quick and easy to access.
Hope this helps.
Reason for Edit: The application which inserts the hyper link wasn't working properly the first two times I used it. Obviously it is working now.
Edited by dc3, 14 October 2012 - 10:12 AM.