I have been using Genymotion for about 4months now and all was well until I updated Virtual box to 4.3 . I did not like it because I didnt know how to run 64 bit OSs on it,so i
just get into virtual box open settings of your virtual device,search for network ,verify it is in host only adapter but just down are the advance settings. click there and set the option promiscuos mode to allow all. and that´s it. start to virtual machine and start from genymotion enter image description here