You may try the following process:
- Run VirtualBox as administrator (By default is installed in C:\Program Files\Oracle\VirtualBox)
- Go to File -> Preferences -> Network (Left Navigation List) -> Host-only Networks (on the right tab)
- Select an adapter and click edit (the small screwdriver on the right)
- On "Adapter" tab set
- IPv4 Address: 192.168.1.201
- IPv4 Network Mask: 255.255.255.0
- On DHCP Server Tab set
- Server Address: 192.168.1.100
- Server Mask: 255.255.255.0
- Lower Address Bound: 192.168.1.101
- Upper Address Bound: 192.168.1.199
- Click Ok (Host-only Network details), click Ok (VM Settings)
- Open Genymotion (as Admin), install a new virtual device (you have deleted all past devices) and start it
It worked with Genymotion 2.5.3 and VB 4.3.12, hope it helps !!