Genymotion will not load a virtual device

Question

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 downgraded to 4.2 . Now genymotion machines wont run. at the end of every machine (factory-backup) is appended and this is the error I get:
Failed to open a session for the virtual machine Galaxy S4 - 4.2.2 - API 17 - 1080x1920.

Failed to open/create the internal network 'HostInterfaceNetworking-VirtualBox Host-Only Ethernet Adapter' (VERR_INTNET_FLT_IF_NOT_FOUND).

Failed to attach the network LUN (VERR_INTNET_FLT_IF_NOT_FOUND).

Result Code: E_FAIL (0x80004005) Component: Console Interface: IConsole {db7ab4ca-2a3f-4183-9243-c1208da92392}

Reinstalling genymotion or virtualbox yields no results. I am also running VMware on my machine. Please help I use this for development purposes

Answer 1

The following steps from an answer on the superuser community (https://superuser.com/a/1002243) worked for me. I'm running VirtualBox 5.0.10 on Windows 10, with the Fall 2015 Windows 10 update. In my case, the problem seems to be directly associated with the Windows 10 update. (I'm using VirtualBox in conjunction with Genymotion 2.6.0, but I don't think the Genymotion version is a factor.)

1. Open Windows "Network and Sharing Center"
2. Click "Change adapter settings"
3. Right click your Virtualbox host-only adapter and select Properties
4. Enable "Virtualbox NDIS6 Bridget Networking Driver" (if it's disabled - if it's not, see next)

If the checkbox in step 4 was disabled, VirtualBox should work just fine now (no reboot needed). Otherwise repeat steps 3-4 for every network adapter you have (Ethernet, WiFi...) and always uncheck the NDIS6 checkbox -> apply -> check it again -> apply.

Answer 2

1. Click on "Open Network and Sharing Center" by right clicking network icon

2. Open channel adapter settings

3. Click on Properties of VirtualBox Host-Only Network by right clicking

4. Enable Virtualbox NDIS6 Bridget Networking Driver by tick on box and click OK button.

5. Open your VirtualBox and try opening device. It work now.