I am on XP. When I tried to upload the AHX file I was informed that only .txt files could be uploaded, so I saved the doc in Notepad and then uploaded the resulting file. Sorry if it came through as gibberish. I am not sure if the host USB driver is current. I went to control panel, system, hardware, but could not identify how to do that. I did clear interface memory repeatedly, have done the battery ritual, downloaded again to the interface, detached USB cord, tested a macro from controller that was very near (worked fine) and then, when I come home at night, the outside lights (on Active Home timer) are not on, and that is my first indication that the interface has failed. When I try to activate any controller in the house, interface does not respond.