WIU is unaccredited, and they make you do some busy work, but it is not a recognized school, so if you are doing university-level work, then you should look to a school that will grant you a recognized degree when you are finished.
There are 2 levels of unaccredited degrees. The first kind, you need a valid credit card and 3 days of waiting. The next level is sometimes referred to as "sophisticated diploma mills", since they will try to get your buy-in as to its legitimacy by awarding "life experience" credit and assigning some perfunctory work.
As far as accreditation, err yes Harvard is obviously accredited.
CHEA Database of Institutions Accredited By Recognized U.S. Accrediting Organizations