Thanks for the replies. The adapter is the latest version, updated by a few months ago. Worked fine after that. Since the ios app works fine, I don't think anything is wrong with the adapter or the wireless. In the PC, I see the IP address of the controller, and I can access the "configure screenlogic" utility. But when I try to "start screenlogic" I get a window with a blank screen. I've rolled back the windows update and no change. Tried it on different users on the computer, no change. Uninstalled it completely and reinstalled, no change. Calling Pentair today but not expecting much.