I had the same problem after the latest update to 17.4.2294. Had to turn it on myself. But for some reason it fixed itself ?
after a couple of days. I´m running windows 7 Home premium SP 1. You could try to disable it and then enable it in settings and the click save at the bottom of the settings page. I did that and the next time I started up the pc I didn´t get any warning and everything was turned on. Worth a try. I´m not sure if that did the trick but who knows.