Allen - okay, thanks, I hadn't see that webpage before. Unfortunately, the poster mentions changing encryption to WPA2-Personal to fix his problem, which is what I already use.

Also, he mentions having his Windows 7 computers set to All Users wireless profile or whatever, which I'm pretty sure I have set on my Win7 laptops, but I'm still having network connectivity problems before users login to domain.

I'm using HP ProBook 4540s laptops, Surface Pro 2 tablets, and Ubiquity Unifi Long Range wireless access points.