My widi worked fine in windows 8.0
I have a fujitsu lh532 with HD 4000 graphics and Centrino Wirelesss N 2200 network card.
I updated to windows 8.1 and then updated both my graphics and wifi drivers and ran the widi update tool. When I went to project a second display it found my neotv max widi reciever the first time but would not connect. After that it would not find my neotv max widi reciever.
I think I am going to uninstall and go back to windows 8.0