Information on setting up a Logitech Harmony remote can be found at MyHarmony.com. In North America, Harmony products come with 90 days of toll-free phone and email support. Past this period, any phone or email support requires a payment, paid on a per-incident basis.
A discussion forum is available to ask questions to other users and read discussions about setup issues. A list of common problems and their solutions is also available for both the Harmony line and specific models.
MyHarmony.com's setup page offers a software download that is compatible with most Harmony remotes. An older version of the software allows users to set up older models of Harmony remotes.