This is to let people know what I found out today the hard way. I have a 1997 F350 and it has been down about a month with CEL on. Got tired of waiting for a friend to come by to scan it. So I bought a new laptop, needed one anyway, and ordered the AE. Loaded it and could not get it to read. Called AE and found out right now it will not work with Windows 8.1. They said they are working on the problem and it will be fixed. But I gotta find a laptop that I can use to read CEL now.