I can't connect my iphone to itunes?

I'm using a lenovo yoga laptop. Quite recently i updated to windows 8.1 and ever since i can't connect my iphone to itunes, and the songs in itunes can't be played. I upgraded itunes and my phone to the latest software but it still doesn't work. I uninstalled itunes and installed back still doesn't work. Now i can't add songs to my music player or play any songs at itunes. Can anyone help me on what to do? I'm not sure if windows 8.1 is the cause. If it is is there a way for me to downgrade?

I experienced the same problem, apparently there's a bug in windows 8.1 with iTunes, I'm not sure though hasn't worked for me since i updated my computer, You could try to update the apple drivers on you computer, not sure if it would do any good, didn't for me