[Mail pops up every five minutes]
Just go to msconfig.and open start box and untick Windows Live mail.Apply or Ok.
That way you will only get mail when you open your e-mail account.
Thats the way I do it and just check for mail about 3 times a day.
Close the account Just sign out of Windows Live mail and remove any usernames or passwords.
That still leaves your account open for use anytime you want to sign in again.
Not sure if there is a way that you can actually delete your e-mail account but I am sure someone will be able to tell you how.
Do you use windows live messenger maybe stop that from starting when you start your computer.
Open messenger.Tools.Options.Sign in.Untick start messenger when I Log on to my computer.Apply Ok