If you know your logon password:
(Please remember to set your challenge question and answer set in case you forget your password.)

• Go to the password change page
  (Note: You can also change your password from Windows by pressing Ctrl-Alt-Delete and clicking on the “Change Password” button.)

If you do not remember your password:
You will need to reset your password. For this to work, you will need to have your challenge question and answer set.