After first installing Windows Live Mail, if the menu bar (the bar at the top of a program with entries such as "File", "Edit" and "View") is not being shown, you may make it viewable by selecting, on the upper right-hand side of the window, the icon to the left of the "Help" icon (blue circle with a question mark in it) and select the option to "Show menu bar". 

Once you can see the menu bar, go to "Tools" and select "Accounts...".

Click on "Add..."

Select "E-mail Account" and click "Next".

In the first box, enter your email address. 

Next enter in your password. If you would like it to remember your password, check the box below the password field.

For display name, enter the name you would like to appear in the "From" field of email sent from this account. 

Click "Next". 

Make sure that POP3 is selected for the "My incoming mail server is a ____ server" field. 

The incoming server should be set to: mail.mtnisp.com 
The port should be 110
The box beside "This server requires a secure connection" should be unchecked

The drop-down box next to "Log on using:" should be set to: Clear text authentication

Login ID is your email address without the @mtnisp.com part. For instance, if your email address is "jsmith@mtnisp.com" you would simply enter "jsmith" as your login id. 

Click "Finish". You have successfully completed setting up your account on Windows Live Mail.