This depends on which e-mail handler you have. Outlook comes with Microsoft Office, Outlook Express comes with older systems up to and including XP and the later ones have Windows Live Mail. Other handlers are avaioable - Mozilla Thunderbird for one.
That said, many people use webmail these days to view their mails on an Internet Explorer or other browser page.
Without publishing your e-mail address, post back with some details of who provides it - G-Mail, Hotmail, etc. for example, and which version of Windows you're using. Someone will be able to help.